Posted this in the
"3 million downloads" thread, but figured I'd cross post here too (probably more relevent in this thread anyway).
Upgraded our two machines this weekend:
2010 MBP 13" (late)
2.4GHz C2D
6GB RAM
Running Snow Lep (from the original OOTB factory install)
Installed from a USB stick (16GB, partitioned to bootable 8GB, flashed from the original source download)
15-20 minutes initial install setup (from USB), ~30 for install, ~10 minutes final app conversions (mail, calendar, etc.)
2011 MBP 15" (mid), running Lion
2.3 i7 quad
16GB RAM
Running Lion (from a clean install)
Installed directly from download (via the App Store)
3-4 minutes initial setup (from HDD), otherwise about the same
Both went flawless, both are running smoother,network/web access is notably faster. Notifications look great, email, cal, tasks, etc., all synced up across devices, AirPlay is _very_ slick from my machine (the '10 machine doesn't support it).
My machine did require me to update my Parallels from V6 to V7, though I might wind up moving to VBox (my V7 is just a trial for now).
Herald was a plugin for Mail, not compatible with 10.8 mail, +but+ nicely replaced by the new notification system.
Little Snitch was also flagged as incompatible (and disabled), LS3 is being previewed, should be out soon (looks slick, using the notification system too).
I completed ALL updates on the two machines before moving to the ML update. That included an EFI update, for the 15" the 10.7.4 and patch, Java, etc.
I confirmed a TM backup and a full image backup as well before proceeding
