I have to say that I am really surprised by FS reaction, because I liked them almost most of all sites.
Hear what happened to me. Somebody stole my FS account, changed my pass and information so I lost my PREMIUM account with so many files and some earnings. I wrote to FS so many times but there were not a single answer from them and I am really surprised, because I expected them to react fast, but it seems that they don't even care about their customers.
Pleasant surprise for me came from FileServe , because this happens to me at the same time with their account and they reacted immediately and e-mailed me so many times until I returned my account.
So, my negative vote goes to FileSonic this time, like I said, I really didn't expect them not to react on my situation...