Okay When You Factor In Price
I've had this amp for about a year and used it for quiet practice (what I bought it for) both through the internal speakers and headphones, both with and without an iPod plugged in for accompaniment. I have also used it connected to a computer as a recording tool.
As a standalone guitar amp it is pretty dismal. Lots of hiss through the speakers. The models are extremely unconvincing and uninspiring when playing it this way and the effects are, at best, marginally accurate. The noise gate on the higher gain models is very annoying (although you can turn it off using the softare) and the models themselves are too wooly to be usable. The clean models are lifeless and don't have any of the glass that you expect with these types of sounds...not at all pleasant to play. The medium gain sounds (crunch and super crunch) are the best choices when going through the speakers, but still lack a bit of dynamics and seem overprocessed and compressed, however on the plus side they do respond very well to the guitar volume control and you can actually clean them up quite a bit by rolling them off.
Using with headphones as a practice tool it fares slightly better. The terrible hiss is gone and the amp models have a lot more authority, as the cab simulator is on when the headphones are engaged. The clean tones benefit most from using the 'phones and you are able to dial in a pretty passable Fender-style clean, and with a distortion pedal in front of the amp you can get a good, meaty tone out of it once set correctly. The medium gain model are a bit more authentic sounding this way as well, also benefitting from the cabinet sim. With modest use of the built-in effects you can dial in a gritty, spacious rock tone that is pretty passable but still quite generic. However, here too the higher gain sounds are pretty unusable and hard to control.
This amps best use has been plugged into the computer as a recording tool. The caveat there is that only one of the amp models sounds good (crunch) but it works well enough and sounds just realistic enough when it is tracked with drums and bass that it makes the purchase of the amp justifiable.
Maybe I am being too critical of a $100 amp, but considering the quality of tones available in the similarly, or slightly higher, priced Fender Mustang I feel like a made a poor decision, and I will likely be looking for an alternate practice amp and then use this strictly as a recording box. Probably something like the little Orange Crush amps. They only have one sound, really, but they are all-analog and I would rather have one good tone than a half-dozen bad to mediocre ones.