I have used Joy wax from the very beginning. And those that have said "it changed" are ,in my opinion, correct. It has changed somewhat. And yes Ive had a couple (only maybe 2 or 3) slabs over a period of 6+ years that caused me problems. Overall this wax is wonderful .The scent throw is awesome. I have also tried to make tarts with straight Joy wax, and found them too soft. Definitely. But they scent like crazy, lol. So all of the tarts I made with it, are just for my own use. I can tolerate the messiness and less than beautiful appearance. I would also recommend mixing the Joy with another, firmer, wax for tarts.