After receiving mine and finally clean installing all my apps, I couldn't be any happier. "Breakthrough speeds" pretty much sums it up for me. Coming from a 2008 quad Mac Pro (which wasn't exactly a slouch), the speed difference is night and day. I was just wondering if there were any upgraders that weren't happy with their purchase. I'm also curious if the 2012 fully loaded owners feel justified with their upgrades and if performance difference was worth it to them.