X220 with 9-cell battery, ssd from a broken macbook pro and 16 gb from the same macbook pro. Yes, it is the best laptop I have ever owned (and I owned many). I have several (bought for almost nothing from a company sale) for replacement; if I break one, I am up and running in 10 minutes again. I think I paid less than $250 for 5 pristine ones + 2 new 9 cell batteries new in box.
It is surprisingly fast for it’s age with i3. Besides ML or iOS compiling (which I just do remotely) stuff I do all my dev on it.
Edit: also, if you hate this screen resolution, you or someone on the webs, can put in a much higher res screen in. There is so much you can replace in these things and the keyboard is such a pleasure compared to modern keyboards. Imho ofcourse.