My x220 has traveled around the world multiple times. It's been through dozens of airport scanners, dropped multiple times, and shared a few cups of coffee with me by accident. It just keeps on kicking. My x220 running Debian is actually quicker and more responsive than my friend's modern Lenovo running Windows. I'd be tempted to upgrade to a lighter and thinner laptop, but I'm too attached to the keyboard.
I have one too! The 720p is just not enough, I wish I could at least have a 1080p :(
Do you ever have any trouble at airports? The one time I ever had grief at an airport was a few years ago travelling with an X230 with the larger battery pack. Security seemed extremely suspicious of such an old laptop and I got stopped again later by a plain clothes security guy.
Airport scanners? Are those normally dangerous to laptops?
One of the few things I'd change about the X220 is the strange 2-piece lid. (What looks like a cosmetic flourish in the lid is actually a seam.)
Two of the four used X220 units I've bought arrived with the lid end piece wiggling, because it was no longer firmly attached to the main piece.
The X200 and almost every other ThinkPad managed just fine with a 1-piece lid, including being rugged against drops, so I don't know why the change.