Hi guys, I'm currently waiting for the refresh of the iMac line and one of my friends asked me if I would like to install OS X ML but I have a few questions to ask before. First, is it safe and reliable to use everyday as a main computer? Will it work well? Secondly, when ML will be officilally available in the Mac App Store, will it be possible for me to just buy it and install it without problems over the developer preview that I'll be running? Thanks!