Summary: This computer embodies the essence of the Thinkpad line: great keyboard, durable, reliable and classic look. It is very lightweight (not as lightweight as a Macbook air, but this is a business class machine with lots of ports) and for me the screen size is perfect. It manages to hit the sweet spot on portability without losing a lot of amenities you get in larger laptops (VGA out, Expresscard slot, etc). One of the best things about it is the battery life.
Summary: I purchased the Thinkpad X220i after scanning the market for 11-13" laptops that would let me do all kinds of things ranging from browsing the net to doing heavy duty development via remote controlling a few servers I maintain. Without even starting it up for the first time I replaced the 320 GB drive with a 160 GB SSD drive from Intel and installed Ubuntu (kubuntu) linux.