WhiteyBoard is the only type I've tried, so all decals might have this problem, but I found their product to be pretty awful. Came damaged, didn't stick almost at all. Their customer service is also a absurdly poor, which I'm pretty sure is a problem specific to them - I recommend avoiding.
Agreed, we have this in our offices and it really sucks. We didn't have issues with the whitey boards arriving damaged, but they don't stick very well and tend to slowly peel off the walls. In addition, you can't really erase anything off of them without water or some sort of spray and a paper towel. Erasers don't do jack.