Only problem I experienced was that "DropBox" would not install properly on 14.04 but after todays update which included an update for DropBox, this now too works fine. Guess this is all hardware related. Both 13.10 and 14.04 works great on my Thinkpad X230 The only complaint I have is that some of the "F" buttons dont work on my hardware like changing the screen brightness (this was also true for 13.10), but I can use the GUI to do this. Also 14.04 boots slower than 13.10 (15 seconds vs 10 seconds). I am 99% happy with 14.04.