I've had my X52 for over 5 or 6 years now without any real problems. I heard a lot of people saying that the X52 has calibration issues but I've never had any of that with mine.
Through all these years now the only problems I have with it is the D button on the throttle is a bit touchy and will double activate sometimes, one of the directions on the 4 way hat switch on the throttle is also touchy and double activates, and the cup sitting under the spring on the stick is pretty worn so the stick will be stuck when trying to perform maneuvers sometimes. I fixed that by putting a piece of cloth under the cup, played with it for about a week, took the cloth back out and the stickiness was solved for a few months.