I loved my pearl cobalt bomb. GREAT ball that inspired me to try some of their other stuff. Over time I had a Red Death, Blue Death, Time Bomb, Buzzbomb/R, and a Chainsaw. I disliked all of them, and truly hated the Time Bomb and Chainsaw.
It was hard to justify that the cost was worth it after so many stinkers (luckily I buy used often).
On a side note, it always struck me as odd that their big claim was that diamond cores hit 20% harder, but most of their cores weren't diamonds. The science behind the 20% claim was debatable anyway, but it was completely null and void once you modify the diamond shape.