Lenovo decreased the build quality with every iteration. The original IBM ThinkPad T60 was rock solid. The Lenovo T400/T410 and X200/X210 were great too, but already with thinner plastic case. The T420 and X220 were the last good series. The T430 and X230 came already with a bad keyboard&trackpad and was made of less durable plastic. It all started with the faulty T410s (mind the "s") which plastic was way too thin. The X1 is not a ThinkPad, just a generic notebook with its name attached. Maybe Lenovo changes their product strategy, then one can buy new products again.