Yes, over the past 15 years I bought at least a dozen used thinkpads of the X series (x201, x220, x230 and x1). Most of them are now with other family members and friends (they are now also Linux Desktop user). And I still use 3 of them. One daily, the other weekly, and the 3rd for conferences. Beside that, I am also a fan of the T and yet of the P series. And I have a small collection of thinkpads with the big blue logo from the A and R series, but that's mostly just for fun.

I could never get into the smaller x series thinkpads. The 14 inch screens on the T4X0 are just right for me.