I have a newish X13 and have owned several ThinkPads since the T40. It is the best made machine from them that I've used so far. The keyboard is still good, not as great as the X230 or previous (not full size). The memory is soldered I believe, but harddrive is not. Screen is fine. It is AMD and had a few problems to start with which have ironed out.

I would say, overall, this is an excellent machine for doing work and build quality is excellent. It's a shame that Lenovo have such dubious ethical standards.