The Lee moulds aren't very well made but they can do the job well if treated right. My neighbor works at Lee as a mould tester/repairer. H etold me the biggest problem with their moulds is galling on the mould face from not lubing them.
Most of my moulds like to be run very hot- you don't get wrinkles, but you get a frosty appearance which doesn't hurt anything, the tricky part is keeping the sprue plate cool enough so that the bases of the bullets don't get torn. I touch a damp towel to the sprue plate after dropping the bullet(s) to cool the plate before closing it and refilling.
There is a lot you can do to make your Lee moulds run better. Here's a link:
http://castboolits.gunloads.com/showthread.php?t=654I do this to my moulds now, its well worth the time and effort unless you are lucky enough to get a mould from the factory that fills out perfectly andwhere you don't have to beat on the handle hinge to get the bullets to drop out.