Mountain Lion on Intel Core 2 duo (2009 macbook pro) has anyone tested the new Mountain Lion on a 2008/2009 macbook?(aluminium) I've heard that with Lion some problems occured like mac becomes slow, battery life is halved etc. I'd like to know specific problems regarding updating from snow leopard to mountain lion on a 2008/2009 macbook pro with intel core 2 duo and 4GB ram, thanks!
I've installed Mountain Lion on a Macbook Pro 3,1 (2007). "Over the top", so no clean install.

Specs: 500 HDD, 2GB DDR2 RAM, 2.2 GHz C2D 

This is the oldest MBP which supports Lion. And it runs fine. No hiccups so far. It boots as fast as before (~1 min). It sleeps reliably. But I can't comment on the battery life yet.