The whole trek Rail series is known to be a very good climber and very stable on single track, hence the name since it feels like it’s on rails.
I believe the trek rail won e-mtb of the year for 2020.
Most treks are usually very reliable but there are always a very small percentage that aren’t. The difference is when buying a trek you have full support from the vast dealer network so if the unlikely happens and something does go wrong you’ll be covered at no cost to you.