Same here.  
 
I also use a Vox Tonelab live through a keyboard amp, and I can get feedback there as well.   Just like a real amp you need to push a few molecules around.   
 

Just to speak firsthand on the Scuffman amps...I downloaded the demo...brought it into X3...and
 
WOWWWWWWWWWWWWWW!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 
The range of tones and sounds is beyond incredible.  My biggest problem with other amp sims is that those presets were just soooooo ridiculous and required so much tweaking.  Fuzzy outer space sounding, some of the ones I tried.  I've barely made my way through 30-40 of these and am already sold HOOK, LINE, AND SINKER.
 
No...I don't work for the company at all.  Hee hee.  I totally recommend it for any guitarists out there looking for different.  And by different, I mean awesome.  And by awesome, I mean totally awesome.
 
I'll be enjoying the 15 day full demo before purchasing it.  Thanks for whomever on this thread mentioned checking it out.  =)

You always have to tweak the stock presets to get the sound you are after. What might sound good when you track may might need to be changed during a mix - and that is the beautiful advantage of the sim.
 

When I read these posts about Amp sims I always wonder what some people are using to "monitor" these sounds. I can just see the programers in their laboratories with the greatest flat response tube amps and high quality speakers getting it as good as possible only to have their products be monitored through some crappy earbuds or mediocre studio monitors or laptop to solid state guitar practice  amp. I think that is one of the bigger components of the system as a whole. Seems to never come up in these discussions. I bought a Carvin TS100 tube amp and some 1x12s and my GR5 presets sound night and day different from my daw when recording straight in.

I have Yamaha HS80Ms

caminitic
Just to speak firsthand on the Scuffman amps...I downloaded the demo...brought it into X3...and
 
WOWWWWWWWWWWWWWW!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 
The range of tones and sounds is beyond incredible.  My biggest problem with other amp sims is that those presets were just soooooo ridiculous and required so much tweaking.  Fuzzy outer space sounding, some of the ones I tried.  I've barely made my way through 30-40 of these and am already sold HOOK, LINE, AND SINKER.
 
No...I don't work for the company at all.  Hee hee.  I totally recommend it for any guitarists out there looking for different.  And by different, I mean awesome.  And by awesome, I mean totally awesome.
 
I'll be enjoying the 15 day full demo before purchasing it.  Thanks for whomever on this thread mentioned checking it out.  =)

I would like to take credit for that, although I had nothing to do with the actual software :)
I had the same experience though, and I'm not even a guitarist. Bought it in a "quest for the ultimate ampsim", after the TH2 upgrade, Waves Guitars, Amplitube 3 with a lot of expansions (some of which I really do like) and GR5. It's just great, and became my go-to ampsim unless I really need a feature it doesn't have (which isn't that often).

I have DynAudio BM5As btw, since we're sharing :)

FWIW I think the included TH2 is pretty good - I especially like the THD Univalve amp.
 
I also like the Softube Acoustic Feedback plugin which gives some extra realism when playing hi-gain, it makes it feel more like a tube amp.
 
Here is an example track I did using both of those for the lead sound;
 

 
(embedding soundcloud doesn't seem to work here)
 
Cheers,
 
Laurence.

Try again, link didn't seem to work above;
 

 
Maybe this time!

Monitoring? The same Genelec system I use to monitor hardware guitar stuff post tracking with no problems at all.

I guess what I meant was how could anybody tell if you were actually hearing the sim in it's intended state unless you had the same equipment as the programers. They all sound pretty darn good to me at times. I guess I really don't care if this one sounds exactly like a certain tweed with a certain mic and that one sounds exactly like one of the hundreds of Marshall systems. Maybe as a studio owner you would could get a request for a specific amp setup. It's all art to me!