Haven't used them yet, but they set up my account with a $750 deposit limit.   
Thankfully I got most of what I wanted through Cavirtex in Dec - Feb.   I guess it's better to be cautious, but with the degree of verification required, I would have expected at least 2-3x that to start.  Cavirtex was never a problem if deposits were broken into <9k chunks.  Of course, they didn't survive, so who knows    I'd really like to hear some feedback before sending QuadrigaCX my money....