okay, i wanted to make a topic where people can share their experiences with this update, as its the first major update to 10.8. there are issues with mountain lion for quite a few users. some include: Color Profile Display Switching with GPU i.e. if you open an app like iPhoto which will make the graphics switch, the colour profile may switch to a more blue-tinted profile and only goes away after you quit the app(s) in question. WiFi -wake-from-sleep issue some users reported the WiFi to stop working on their MacBooks when booting from sleep mode after many hours. Low Battery Life Issue many many users have reported a much lower battery life in their MacBooks since upgrading to Mountain Lion. Graphical Glitches and Freezing Issue quite a few users including myself, have been experiencing this one - the OS will freeze, the cursor will continue to move but everything else is unresponsive. Mission Control/Swiping Desktop animation lag issue another many have reported including myself is the laggyness, or stuttering lag to the animation of desktop swiping between spaces. Blurry Launchpad Icons issue some users have reported a blur to the icons in Launchpad, i have this as well, for me it is very very slight, but its there. i just updated to 10.8.2. heres my experience so far: Battery Life: seems worse actually. on the last update i would get the battery to mention anywhere up to 8 hours, though it would usually stay around 5 hours. sometimes it would never go back to 8 hours. now its started at 5 hours after a full charge, bluetooth off, and screen brightness half way or less. little effect. Lag issue with swiping and animations- 10.8.2. has definitely tweaked the speed and animation of swiping its faster like Lion was. when i have apps visible on desktops though, i still experience the stutteryness sometimes. its not consistent but still there. its too soon to say about the other issues (freezing, color profile changing) but i will be looking out for these. how has your experience been? by the way, i noticed i can't get the Reminders app to rid this 'badge' alert on the dock icon, you know.. the red badge, with the numeral '1' on it? anyone else got this or know how to rid it? lastly.. launchpad seems slower and a laggier than before. im wondering if i should do a fresh clean install.