I have been using them for a while and I even have a support contract but I am nervous about this as well. After some deeper conversations with a sales person there who insisted "everyone is stealing their software" I informed them that the only reason I was using their system was because I was able to use it before I bought it and that it was open source. I really don't think that person understood the OSS concept at all. That being said, i have never had any issues calling their tech support and getting help on any issues I have come across regardless of if it was a bug or self imposed. I still recommend them for now, but if they start to crack down beyond the stupid warning I will be jumping ship and they will loose my business. This is just my 2 cents though.