Nearpow. Every now and then I might bump a button so it turns off idk but for the most part they never fail me. Easy to remember how to set them where as setting it for something like gas lantern routene it can hard to remember how to set it. They never stayed stuck on but happened to some people.
My setup is flood proof but a bitch to run. Up to 6 five gallon buckets filled daily. I use utilitech outdoor timer for lights its never failed me and never forgot how to set them.