Since I started using the U1, the accumulation of print hours on my single-nozzle printer has slowed down significantly; the U1 has logged 1,000 hours from April to now, whereas my P1P took three years to reach 9,000 hours.
In my opinion, the stability of the U1 is among the best of the branded Klipper-based machines I’ve used.
However, I generally use high-performance materials from the brand “ipcon.” They don’t require a heated chamber and don’t warp at the edges; the performance is excellent, though they are very expensive.
Haven’t you asked BTT about this? When they brought this item to me, it was primarily intended for the P1, but they said it could also be used with the U1.