Are they really as bad as some people say? I've hard from several people that using third party memory cards is quite risky. They tend to produce errors like data loss and other failures. I have one original memory card for the PS2, and never occured any problems. I need to get a new one today and again I chose an original one (ok, I didn't see any third party card...).

I have about six PS1 memory cards, three of them came bundled together with a game and were about 7$. Of course those are not original memory cards... But I never had any problems with them either, and they are maybe three years old. So is this third party memory card thingy rather an urban legend? I'm keen to hear your experiences!