Hello, I currently got an iMac with OS X 10.7.3 and today I received a new Macbook Pro, now it doesn't run any games or anything heavy because I just use these on the iMac, I was wondering if you suggest me to install OS X 10.8 Mountain Lion Preview 1 on it, I really can't wait anymore for the Reminders and Notification Center... I am like in a real need of them. I was wondering if you suggest me doing that? ( cause it's just not that bad... such as crashing much and etc... ) and if it's possible to install an Upgrade and not a clean installation ( formatting my current OS X and to install Mountain Lion )? Thank you!