i recently bough a shappell because it was affordable and looked durable to me and i was wondering if anyone has had problems with theirs tearing. i have used mine three times and it looks like i might have a start to a tear or maybe it is a crease from folding it down and it getting wrinkled. i am just afraid of folding it and the hinges tearing it because they warn you of it in the manual that comes with it. has anyone had a problem with it? or i' trying to be too cautious because i want to get my use out of it and make it last.