I've played the seven-string version of that bass - other than having one fewer string, everything was identical. I was not at all impressed. The setup and fretwork were horrible, the string spacing at the nut was crazily and randomly uneven, and the finish seemed very cheap - like the kind you see on $20 "toy" instruments.
It was something like $300 used at a local store. I goofed around on it for a few minutes and it was fun, being my first time really playing a seven. I still wasn't interested enough to plug it in, so I can't comment on the electronics.
Someone did eventually buy that thing. I got a GTBD-7.