I can honestly say we have tested many versions of this feeder across quite a few tanks spanning about 5 years now and there have been no reported timer failures, every test tank used an Apex. We started testing with the wifi timer I linked to earlier about 4 months ago and have had no issues, it is a much smaller sample though. This feeder also uses the exact same motor we have used for Swabbie, many if not most of those are deployed using a Apex timer, the sample size of that is HUGE, I have never heard of a single Apex timer failure in over 10 years of that products life. There was a reason we chose to use that same motor here
That being said, best practice would be to only put a weeks worth of food in the feeder at once until you are comfortable with it, most mature tanks can handle a large single addition of food like this without crashing, you would obviously want to do some water changes but it shouldn't crash.
I would say the risk of accidentally knocking ANY feeder in the tank is a greater risk than an Apex timer getting stuck on using this device. It has a pretty robust clamping system so we even tried to reduce the risk of this happening with The Plank.