I had like a million questions before I ended up actually buying and each of my emails was responded to within a day at most, and a lot of the time is was just a few hours. A far cry from the non-responses most of these type of sites seem to be known for.
Once I got my card I was putting the wrong kernel on it, and I had to ask for help, and just as quickly as before I placed an order they responded and helped me out and let me know what I needed to do to make it work.