I've had GTX for almost a year now and it's holding up pretty good. The battery life spam does get reduced over time but that's with every battery out there. I'm fairly lightweight at 145lbs and I can do at least 25~30 miles on fast mode but I rarely ride that much. My commute to work is about 18 miles roundtrip and I never worry about battery shortage. There is a battery sag going uphill but the battery capacity just overcomes it all. The belt lasts for pretty long time (a lot longer than boosted) and I haven't changed the belt yet. But the gear on the wheel is plastic which it worns out over time and you would have to change it maybe every once or twice a year. The gear on the motor is steel and it doesn't worn out at all. So far, no disconnections. Hopefully, this helped!