We bought T440s a year or two later and both were just abysmal. The trackpad, the keyboard, everything is crappy and fails to work properly. No one at our company would use them and they sit in a closet now. I've been monitoring Lenovo's laptops recently and they all seem to be getting worse and worse.
I have read similar things about basically every laptop(heck even cars, TVs, Fridges) brand in existence.
Ars Technica just reviewed the 3rd generation version: http://arstechnica.com/gadgets/2015/02/thinkpad-x1-carbon-re....
Mess with my muscle-memory and you're sure I will never buy your laptop. Same reason I'll never consider MacBooks: Non-standard keyboard.
OK, that's one part of non-traditionalism :-) Luckily, the Ctrl and Fn keys' functions can be swapped in the BIOS (but obviously, the key labels will stay put).
I referred to the strange setup of the Caps Lock key, and the missing 6th row with function keys. (Although the functioning of the function keys is different in the 3rd generation model than in the 1st generation model).
Then again, the first thing I did when I bought it was install an extra SSD and install Linux.