I'm using the 310U on windoz.
To be fair, when it way my only scope, I did use it quite a bit. I don't really like their software, and don't have the inclination or time to write my own. Past versions of the DSO have crashed, and been erratic, but the current one seems to work not too badly. When my bitscope is plugged in to a USB port, if I switch on my fluorescent desk lamp, windoz thinks a device has been plugged in. With the last DSO, I had to re-install the driver every time this happened.
I also have never been able to use both channels at the same time on mine, but do use it as a logic analyzer, and that seems to work fairly well.
However, I did drop more coin on the Bitscope (around $600) than I did on my 350 MHz Tek scope, and would much rather use the tek!