Just like other forums, most of them are people looking for help or have issues with their products. Some of them are even new members and they just threw in a few posts hoping to find a quick solution. I can't speak for all other X2 users but I guess I'm lucky to have a unit that has been working for 2.5 years. I used it in normal driving, parking mode. I didn't have any problems with the transcend cards but when when the word gets out that transcend is not very good. I changed to Kingston and don't have anything so far.
I formatted the cards once a week and I think this is part of the reason why mine is still working well. I came across a Canadian webstore selling X2 and they started to offer good quality Lexar 633x cards now. You might want to do some research from the vendors page.