Sound wise, it's pretty good.
The case is mostly plastic except for the backplate (alum). Its powered with an AC source. Inside is what I take to be an isolation transformer, a diode bridge and filter caps. This produces both +/- 12volts DC to the audio board. One edge of the transformer core is in close proximity to the backplate. When I lay my hand against the backplate, an AC hum is coupled into the audio. Laying one finger against the RCA shield stops it. I suspect that if the case was all aluminum this wouldn't happen.

It's larger than I expected, two of them are the same size as the empeg itself.

As I mentioned in another post, the AC input is a 3.5mm mono plug. There is a risk of plugging this into one of the 3.5mm stereo jacks (3). I recommend extra caution here. For my self, I'm going to void the warrenty an change the jack. My Digi-Key bill is now half the cost of the amp.