I typically try to get my mixes around -12 db avg. with a few peaks around -6 db. Then I put on the Concrete Limiter set to -.01 db out. I bring the threshold down til I get between 2 to 6 db of gain reduction max. This tends to give me a nice, healthy level but, still retain a decent amount of dynamics. When I try this with the adaptive limiter it doesn't sound as loud and, I hear distortion in the affected peaks.
I do like the Adaptive Limiter's layout and GUI. I like that it has LUFS and K System metering. I really want to love it but, it's just not happening. Maybe I need to change my method? 
bitflipper - On your scale of 1 to 10, I'd probably identify as a 5 or 6.
 

I think transparent limiter are supposed to inflate the sound like a compressor If you want harmonics then use a maximiser with limiting in the same process like Sonnox limiter.

I've used AL both for mastering and mixing and here are my results.
 
For mastering, this is maybe the best limiter I have.  It works as advertised with as much or as little transparency as you want.  However, for mixing a different story.  I set the look ahead to minimum and inserted it on two tracks in a  song with two acoustic instruments and one instance of Rapture Pro and one instance of Z3ta +2.  The latency on my converter was set to 256 samples which typically is more than enough for 4 tracks, but I got dropouts galore, and my CPU meters were jumping all over the place.  I replace AL with Waves L1 Ultramaximizer and the problems disappeared.  I repeated this procedure several time with the same results.
 
For now, I'll stick to using it for mastering, and I'll wait to see if any changes are made to it before using it in mixing.

I did a sort of test by substituting the Adaptive Limiter into a project on my desktop computer where I used the PC Concrete Limiter, and quite liked the result. I really like the GUI, and it sounds great, I played with the presets and see them as being very useful. However . . . when I moved the project to my Laptop to add some mobile recording to the project, the Adaptive Limiter was all distorted, pinned in the red, sounding awful ! If I bypass Adaptive Limiter, all is well again . . . went back to Concrete Limiter.
 
Now I'm thinking it uses up a lot more CPU resource that my Laptop just doesn't have, though every other project I have moved to my Laptop has not had any issues like this. (similar cpu, same amount of ram, similar USB audio interface settings)
 
Actually, when I examine the Adaptive Limiter settings I used . . . I used "Drum Bus Aggressive" preset, with lookahead set to "medium" . . . so clearly that will use more resources than the Concrete Limiter would.
 
So , like others have stated, I may have to use the resource hungry settings only in a Mastering setting, not as a plugin in a project ?  . . . though, it's hard to predict what settings will push my Laptop over the ledge.

noynekker,
 
It's possible that what you are experiencing with your laptop was the known issue with the adaptive limiter and the 64-bit double precision engine. Review your Preferences/audio/driver settings. If the DPE is checked, uncheck it and see if that removes the symptoms. There was a thread two weeks ago regarding this, with the subject "Adaptive limiter sounds like ring modulator".

ptheisen
noynekker,
 
It's possible that what you are experiencing with your laptop was the known issue with the adaptive limiter and the 64-bit double precision engine. Review your Preferences/audio/driver settings. If the DPE is checked, uncheck it and see if that removes the symptoms. There was a thread two weeks ago regarding this, with the subject "Adaptive limiter sounds like ring modulator".

I discovered that my DPE was checked, so I unchecked it, put the AL back into my project, and now it is working fine!  Good tip!!  I await the day that AL works with the DPE engaged.

ptheisen
noynekker,
 
It's possible that what you are experiencing with your laptop was the known issue with the adaptive limiter and the 64-bit double precision engine. Review your Preferences/audio/driver settings. If the DPE is checked, uncheck it and see if that removes the symptoms. There was a thread two weeks ago regarding this, with the subject "Adaptive limiter sounds like ring modulator".

Thanks so much for the tip, but turning off DPE in my audio settings didn't fix my laptop issue, though it does seem it help a bit. Also, tried turning "lookahead" setting to low, and that didn't help.
I'm going to look further into my laptop audio interface, I think there's something going on there.

Tried the AL on a vocal track and, it worked very well there. 

I find myself going back to UAD Precision Limiter as I feel confident, the results are going to be good. Ozone has a really good limiting stage although in my opinion it can be overwhelming having all your dynamic tools in the one interface (at least until you master *rimshot* their potential).
 
But anyway, I like LUFS unit part of the meter stage. It would really useful to have a modular LUFS reading which can be viewed from the Control Bar. This way you could ascertain how much adjustment is needed without jumping into the scrolling transient display everytime.
 

interpolated - I agree. A nice meter with vu, LUFS, peak, K, crest, etc. all in one would be awesome.