My boss just bought 7 more 3s for our office. Just wanted to mention a couple things. He could no longer find 3s with 8.1. Our company is about to start upgrading to 10 since it's hard to buy anything that doesn't have 10 on it. I also wanted to forewarn folks that these new 3s, even though they came with Windows 10 installed didn't have the 1511 upgrade on them. On all new Surfaces we get, I immediately do updates. Be prepared to for about 30 minutes or so to complete the 1511 update. Now I need to convince my boss to only purchase the SP4 keyboards. We just got 4 in by mistake, so I was able to try one and I can understand why everybody is raving about them. I'll have to buy one for my personal 3.