Is it a good dry guitar? Should I has it? :D

I have it and use it as a goto electric. The samples seem dry to me (that is a good thing) but Greg has included a few presets that include ambiance if you choose to use them.
 
I still have not dived in deep enough to use it to it's full extents but OTS has some great video demos that can give you a better idea. From my experience, you really can't go wrong when you purchase any OTS library.

This looks interesting. It apparently needs the full version of Kontact. And I don't see a demo - anyone know if there is one?

I don't believe there is a demo other than the video demos.

It is a great general purpose electric guitar library. Since I bought it, I reach for it whenever I want a guitar part in a song. It sits really well in a mix and is very playable. Many of the presets that are included are great at getting a part that fits as a placeholder to be refined later. I wouldn't expect to be able to do Thrash Metal with it, but it suits most other genres quite well.
 
If you follow my sig links to music, the last couple of songs that I've done have used this library, though the "Postcards From Hawaii" had a lot of actual guitars as well.
 
Regards,
Dan
 

It's an excellent piece of software.
While I prefer MusicLab's Real Les Paul, I use Orangetree for variety. It has amp and effects that can be turned off. Also articulations, pickups and more. The video tutorials are excellent. Greg is awesome as are all his products.
The price is right too.

I love it... actually, I love all the OTS libraries, but as a guitar player I was somewhat late to the "gee, let's use a guitar library" party. And I still play most of my parts in, but when the mood strikes OTS are my first pick (see what I did there?)

MGC59
It's an excellent piece of software.
While I prefer MusicLab's Real Les Paul...

 
I'd be interested to hear why you prefer MusicLab to OTS.
 

Evolution Electric Guitar - Strawberry is recorded dry/direct input, so you can do whatever you like to it, just like a real guitar. I was an early Orange Tree Samples customer back when they first started the business (2008?). I began giving Greg, the  CEO, feedback and suggestions for new features (input into what eventually became the Evolution line). I've been using guitar samples since the 80s. I have owned everything from samples in formats such as soundfonts, GigaSampler and Akai from small devs, Sonic Implants and others, to VSTs like RealGuitar, VirtualGuitarist, Slayer, you name it. Besides being a former semi-pro musician, I am a marketing professional with expertise in all areas of marketing, product development and branding and have given advice to several guitar sample devs whose libraries I use and even offered to fund guitar sample libraries with features I've wanted over the years (the Evolution guitar lines represents my dream library to be honest; I gave a lot of input and Greg went far beyond it). I own or have owned guitar sample libraries from a good deal of the KONTAKT devs on the market and none of them have equaled what Greg Schlaepfer of Orange Tree Samples has done, imo. So yes, I consult to OTS and gave input on various libraries and even named the Evolution line -- so, I am affiliated (and I want to be transparent about that), but it was all as a result of my being a passionate sample library user; someone who has been using guitar sample libraries, playing "virtual guitar," for decades.
 
As far as the comparison to RealGuitar, as a former owner of RealStrat and RealGuitar 2L, those are VSTs whose realism and sample quality (a significant shortcoming of the libraries, imo) has been surpassed by many high end KONTAKT sample libraries, not just Evolution. Another major factor beyond sample quality in Evolution is the scripting; that cannot be downplayed. It's an incredibly important factor, as we're not in the early 2000s dealing with non-scripted libraries that are just tons of articulations, maybe velocity layers and round robins making for trackzillas, today, scripting and workflow are critical, and while any of these deep sampled, highly scripted KONTAKT libraries has a learning curve, I find the scripting/programming and workflow on Evolution, and really all OTS libraries is nothing short of amazing and one of the huge differentiators for the libraries. Plus the attention to small details makes a huge difference (I don't want to give away OTS' trade secrets, but this is a significant part of achieving the realism).  Check out the audio demos below and their YouTube videos to get an idea. I compiled this list of my favorite Evolution Electric Guitar - Strawberry demos during the last Group Buy. Listen to the realism. It's made its way unto pop tracks and tv, movie and game tracks for good reason. 

ROCK (including Metal)
http://www.orangetreesamples.com/audio/SlitheryTattoo.mp3
http://www.orangetreesamples.com/audio/StrawberryExtendedTeaser.mp3
http://www.orangetreesamples.com/audio/SteveMorsels.mp3
http://www.orangetreesamples.com/audio/Orangeholic.mp3
http://www.orangetreesamples.com/audio/SoloGuitar.mp3
http://www.orangetreesamples.com/audio/ScarletQueen.mp3
http://www.orangetreesamples.com/audio/StrawberryPop.mp3
http://www.orangetreesamples.com/audio/Jaco%20Rocks.mp3
http://www.orangetreesamples.com/audio/Ruff%20Riff.mp3
http://www.orangetreesamples.com/audio/ZtrawberrieZ.mp3 (customer demo)

METAL
http://www.orangetreesamples.com/download/Revolution.mp3
http://www.orangetreesamples.gregjazz.com/audio/doubletrackedguitar.mp3
http://www.orangetreesamples.com/audio/Essence.mp3
http://www.orangetreesamples.com/audio/EEG-Powerchords.mp3
http://orangetreesamples.gregjazz.com/audio/progmetal.mp3

80s POP
http://soundcloud.com/talvin/talvin-jones-days-of-old-2-mix (customer song)

BLUES
No other electric guitar sample library can do this so authentically. Whatever styles you do, this should blow you away:
http://www.orangetreesamples.com/audio/ElusiveBlues.mp3
http://www.orangetreesamples.com/audio/CherryBassSlapMix.mp3
http://www.orangetreesamples.com/audio/MrKing.mp3
http://www.orangetreesamples.com/audio/FunkyBlues.mp3

COUNTRY
http://www.orangetreesamples.com/audio/Countray.mp3

REGGAE
http://www.orangetreesamples.com/audio/coreguitar-strawberry-demo1.mp3

R&B
http://www.orangetreesamples.com/audio/JacksonTest.mp3

FUNK
http://www.orangetreesamples.com/audio/cherryfunk.mp3
http://www.orangetreesamples.com/audio/Kool.mp3
http://www.orangetreesamples.com/audio/EvolutionFunkGuitar.mp3
http://www.orangetreesamples.com/audio/Funkulous.mp3

VIDEO:
http://www.youtube.com/watch?v=qlKFDakw4k4

edrummist... you said it better than everyone... I started with OT acoustic several years ago and now own all his guitar/bass libraries.  Greg, like Kirk has always been a pleasure to work with, always personally answers any of my questions, and is constantly improving his creations, listening to his customers in their very active blog, and keeping up with scripting enhancements as Kontakt continues to evolve... Updates are always free and his samples are top notch.