I've had in since September 2014(its launch date).
The one quirk I had with it was the pen sometimes disconnecting, I bought a new one and it should arrive soon, I'll include it with the surface (so you get two pens, incase a format and re-install of the os fixes it)
If you're interested in linux natively, people have gotten it running well enough, but some features are missing(buttons on side of pen dont do anything,yet). Wifi runs fine, battery if about 2-3 hours playing civ 5. Watching video is anywhere from 5 - 8 hours, if it's a stream or youtube video. Undervolting the surface increases this slightly(30 mins to an hour). http://blog.davidelner.com/dual-booting-ubuntu-14-10-on-the-surface-pro-3/