I've enjoyed every flight I've had on SAS, especially if you can get a throne seat -- I would take that every time over the polaris seat. Considering the recent thread on window shades, on SAS you're much more likely to have shades open and natural light in the cabin, which also makes me prefer tham (though perhaps not you). Their food isn't amazing, but I'd always liked it, and the service has generally been better than United's average.