I downloaded and installed to my 2009 MBP just fine. Upgraded RAM to 8 GBs, even better.Don't you think its a bit risky downloading a complete operating system. i know it is done with O.S. like Ubuntu. But I have heard of people having problems downloading Mountain Lion.I myself have had the App Store become unavailable for periods.
Has anyone tried downloading and if so is there a verification of the Operating system such as a MD5 hash?