Well, after 15 months of medium to heavy usage, it's ready for dispossal.
My stick was out of the early production batches and it came with relatively big and asymetrical deadzone on X and Y axis.
(Sticks with serial number above S00245477 suppose to be OK)
Deadzone was build into firmware and impossible to correct. Shooting from dead six or fine flight path corrections were nearly impossible. Setting deadzone in game and controller property panel to 0 helped a bit.
Second issue was mouse stick drifting and it had to be disabled which is pitty because it was useful in games with mouse view (poor man's Track IR) and complemented well the usual HAT switches.
After six months of usage, the Y axis developed some sort of stuttering (not fixable).
Intially, it was advertised as all optical stick, but in reality, it is a mixture of optical sensors (X and Y axis), micro switches (most of the buttons and hats) and old fashioned pots (sliders, rotaries, throttle and twisty).
While all HAT switches still work as on day one, pots gave up one after another.
First victim was precision slider. Second was throttle and only deadzone settings made usage of throttle still possible.
Trigger shiny surface rubbed off as well and it feels now like sandpaper.
Finally, twisty pot started to spike and flying became impossible (controls lock and/or sudden spins).
X52 would be ultimate HOTAS if not for very short life time. A year of heavy usage (two at most) is about all you'll get, and that makes it a very expensive stick.
Unfortunately for those who prefer twisty over pedals, it's about only HOTAS worth buying (even with all the vices).