I prefer cake pop molds. The cake pops always come right when using them. I have trouble in doing the cake pops myself, but I never had problems in regards to the cake molds.
Maybe the problem is not the cake mold, but the recipe or the technique. How thick is the dough you use? How do you fill the shapes? Do you fill the two parts at a time or do you overfill one of them and then overlap the second?
The hull I always use is a little thicker than most recipes show. As for the technique, I prefer to fill the two parts at a time and then overlap them.