I traded my compaq laptop for an older ibook g4 1.2/512 on tuesday, it has leopard on it. so far im much happier being back using os x. windows 7 is decent but apple os x is just far better in my opinion. even this battery in the ibook last longer than the battery on the new compaq. i get 3-31/2 hours out of this battery with 200 cycles on it. apple is the best one can get. never going back to windows i dont think!