The GPIO header is flipped which caught me out and I didn't read the online quick start guide first like an idiot. So where the SDRAM says this way face outwards, you actually have to have it facing inwards. Other than that it's been running just like the DE10, took my sd card out of the DE10, popped it in the QMTECH and can't tell the difference.
Obviously you won't have this problem if you buy it with the built in SDRAM which I think gives a better overall form factor anyway.
I don't think it's compatible with existing IO Boards/USB hub or cases with them options, but I don't use these anyway and they are meant to be releasing their own compatible add-ons etc soon