I can vouch for my 13" model. It's rock solid, but when the fan does kick in, it sounds like a turbine spinning up. No freezes though, as this is almost definit

I can vouch for my 13" model. It's rock solid, but when the fan does kick in, it sounds like a turbine spinning up. No freezes though, as this is almost definitely the fault of the ATI drivers (which the 13" model doesn't have).