My club has more than a dozen of these:
https://www.competitionelectronics.c...mart&Itemid=79
Some of them are ten or more years old, and they have rarely broken in a way that was irreparable. In fact, I think the only reason we've ever had to buy new ones is due to theft. They are very intuitive in their operation, something that can't be claimed of all timers, and training people in their basic use consists of, "Here's the ON button, and there's the GO button."