Just an upgrade from my earlier post. Sold my 13", got a 16" and OMG I luuuurve this machine. So much more screen space. Keyboard is miles better. 8 cores makes things very fast indeed. I can even play games if need be. But then if I need battery, longevity, quiet etc I simply run Turbo Boost Switcher Pro to disable turbo boost and I can't even make the fans come and the battery lasts ages yet stuff still run quick as there are many cores to make light work...