Mains or battery 9Volt
Simple to use
Three types of reverb: spring, hall and flerb
At the risk of sounding like the ugly duckling, I find this very reverb below its notoriety.
Mode spring, compress your guitar sound and style in this, others do it better (eg 'Wet reverb')
Flerb mode is a useless gadget (unidentified reverb with a sort of light behind flanger)
This is what I call the EHX syndrome, rather than make one good effect in a pedal, he prefers (in 80% of cases) to at least two effects in one pedal, the second is more or less can .
There is the way that Hall is doing ...
In summary you will spend between 90 and 100 euros for a single reverb.
Let me tell you a pedal as a "hall of fame" TC electronic, passed it to a gadget.
The moral: Save your money