"Best sounding plug I've heard"

Feature:
It's got almost anything you could wish for. I'd like to see a couple more amps, and perhaps a tape echo emulation - and a better emulation of spring reverb would be nice. Also a bigger floorboard with status leds would be nice.

Quality:
The plugin itself seem very stable, but I don't think I'd use a computer on stage in any case.

Value:
Absolutely worth the selling price!

Sound:
In my opinion, nothing really beats the sound of a real tube amp, but Guitar Rig is definately the best plugin I've heard. And allthough you lose a little character by using a plug, you gain an enormous range of sound possibilities not found in a real amp (and certaintly not at this price point).

Support:
Dunno.

Overall:
It's the best sounding plug out there, allthough still not quite there compared to real amps and effects.

"one of the best pieces of software. ever."

Feature:
fantastic! variac, sag, etc...and all the pedals can be tweaked boutique-style

Quality:
hasn't crashed yet. very stable. not much of a hog.

Value:
as far as i'm concerned, it's a hell of a deal.

Desirability:
i've been waiting for this...

Sound:
better than AmpFarm, POD, Amplitube...you name it. i'm an engineer. i've used em' all.

Support:
NI has always been good to me

Overall:
if you play guitar and have a good comp and soundcard; what are you waiting for? i have to use mac's at work sometimes and i've always wanted AmpFarm for PC. this is far and away better.