I have one of those collecting dust in the closet.
It's a closed-source solution (compared to Minimig / FPGA ARCADE) wich hasn't been updated in more than a year.
It has an acceptable C64 core with many incompatibilities wich will likely remain as it is, and a truly poor, poor Amiga core based on modified Minimig sources with no sourcecode available, wich is sad and illegal.
Support is scarce and lame.
Manufacturing quality is BAD: mine got it's power switch broken after a week of use and power adapter after two weeks. It's a cheap piece of s**t in my opinion.
Go for a Minimig or FPGA Arcade instead. If you waste money in this thing, you'll regret.