I have one - seems to be fine despite a few problems here and there in almost 5 seasons of use. All covers require some preventative maintenance to keep them happy and running well. Ropes, cover materials, pulleys, switches, tracks and other areas all wear and break down over time like many things in life.
I really like that the Cover-Pools setup in the Jandy automation allows me to turn down the SWCG % when it is covered vs open. I have an extra PC_Board in my automation panel that helps control all of that (getting that installed was fun as I think ours was the first one put in by the electrician that did our pool equipment).
I haven't found a local service company yet - or at least one who will do service here in Santa Cruz yet. The company who installed my cover was from Petaluma and went out of business shortly after our pool was built. So far I have been able to tackle all of my routine maintenance and small repairs myself.
Honestly, the biggest issues with the cover were really installation mistakes/problems/short cuts that the original installer caused.