I bought this amp as an inexpensive tube amp to get more warmth and tones without effects pedals.
I also didn't want to spend a lot or have a big tube amp taking up real estate in my living room.
The storyline so far....
Bought one from Guitar Center, it hummed badly right out of the box, I was more than disappointed.
Exchanged it for their floor model which sounded perfect.
Got the second one home and for the size its impressive.
Played 4 hours yesterday and it just got better once the entire rig warms up.
I own tube equipment for my home stereo and this amp is very close in sound quality, build quality is going to be the determiner over time.
The amp is hand wired so it should be robust, I have yet to open it up and look inside etc.
The power output is variable from .1 watts for home practice up to 1 watt and 5 watt total power and it works well, of course as more power is added sound improves.
Initially my overall impression is very good even with the first one humming.
Bottom line....I like it a lot but be wary of initial quality problems and work it hard to insure integrity of the unit.
My floor model most likely has the bugs worked out and the tube life shouldn't be too much of an issue.
Uses one each, 12ax7 and el84 tubes.
8" speaker and a small open back cabinet fit my home and playing needs well.
The controls are laid out gain tone volume reverb and are silent and smooth.
I also own a ZT lunch box and a Vox mini3.
The V5 is the largest of the three.
Here's a more articulate review from 2011. http://www.soundonsound.com/reviews/bugera-v5