Never used a X220 but am extremely happy with both my X240 and later the X270, which I'm using right now to write this post. I chose those models because for ye

Never used a X220 but am extremely happy with both my X240 and later the X270, which I'm using right now to write this post. I chose those models because for years I used my motorcycle and scooter most of the time and needed something with more beer than the usual netbook, yet very compact, and after adding a bigger external battery I could reach 10+ hours easily. Linux support also is complete, which is common with Thinkpads. I would be interested in upgrading them one day, but the lack of external batteries in newer models worries me; I want something with serious battery life and would happily add one centimeter thickness for a few hours more.