I have thrown the Siege, Rattler, Fury and Twisted Fury. Loved the Siege, though it is definitely a heavy oil ball. I threw it on the Shark and the carry from deep inside was better than anything else I tried as long as the oil was heavy enough. Also loved the Twisted Fury. I had less success with the other two. I have noticed that the durability of their coverstocks is superior to anything else I have thrown (Ebonite, Storm and Lane Masters) on the Wood Lanes I bowl on. My Fury and Twisted Fury both have 90 or so games on them, but they have no track and I have to look VERY hard to find any scratches. They look like they have about 5 games on them each.