I've got the i7/16GB/512GB SB which so far I am loving although I am having a bit of difficulty moving from a 15.6" laptop, but that's not going to keep me from sticking with the SB. What's of some concern is the fact I have done all the upgrades I know of and I'm still having some of the minor 'nuisance' type issues others in this forum say have been addressed by the latest updates. I am running OS v. 10586.29 and I often get the black screen flicker when I change the page I'm looking at, I sometimes get the loud 'click' which also seems to come when I change the page, most often when I'm in iTunes and I click through different screens, and I've had the error message about the display driver failing and recovering - it happened about two or three times while watching a Netflix movie and several times when I've been doing regularly work. Of more concern is the fact one of my external USB drives would not connect to the SB at one point. I was able to connect the first drive but the second one wouldn't register until I disconnected it and plugged it in again. Since then both drives have been recognized fine except for one time when my primary drive would not be recognized by the SB. I plugged and unplugged it several times and shutdown the SB, all to no avail. Only when I switched the USB cables on the two drives and then plugged them back in would the SB read the primary drive. Since then no problem. And the SB has never had a problem recognizing my iPhone or iPod, so that's the only USB failure so far, Are many other SB users still experiencing these problems with the latest updates installed?