I personally have used two sets, one set on my old coach and one set that came from the factory on the new coach. I had one leak on the old coach because the extension loosened up a little and no problems on the new coach.
On the old coach I checked the pressure every morning (caught the above problem by doing that which saved me a blowout), on the new coach I have a monitoring system so I can look at tire pressures every 6 seconds if I want to
(the update rate of the TPMS).
That's my relatively positive experience, however I have also seen a lot of posts with negative experiences.