last year my brother's invader topsheets chipped all the way around teh edges, Base is not sintered, so it is slower and softer. He put 3 core shots in them. One edge at the tail of the ski started to tear out. he is about 150 lbs and doesn't do big jumps or very complicated rails. They are more durable than the 05/06s though, so tehy may step up the quality again this year. they skied pretty well in the park, and even all mtn but just not that durable