Before finding this amp, I had been trying out and researching different amps for a while. I kept gravitating towards some Fender tube amps based on sound alone, but then I found this amp and immediately knew that my search was over.
The fact that this has no tubes doesn't have any negative effect on the sound for me (I'm fairly certain that if I blind tested this against some Fender tube amps, I would not be able to tell the difference). On the other hand, the lack of tubes certainly does have a lot of very positive aspects. First of all, you get to skip all the hassle of replacing tubes. Secondly, the amp sounds great at all volume levels, unlike many tube amps which don't sound that great at low volumes. Finally, unlike most tube amps, this amp has a headphone output - it's a really nice feature to have if you live with other people.
Overall, the sound is great and the usability is even better. I can't fault this amp in any way.