With the klite mega pack MPC will play every format I have ever run into. I installed gom player with it installed and it didn't play .h264(quicktime).
I dont care which type the software is, I only care what the quality the software brings, like CCleaner, you dont need to pay a dime for it, but it's quite good, isn't? just ask yourself does that piece of ware make you happy, then you will get the answer, good luck:)