I've had two of these; lost the first; love its simplicity and ease in using all features.
The battery replacement needs a tiny phillips head to remove the back, but otherwise, it's a cheap battery and I did replace it after maybe 2 years of use. Nice watch for the alarm feature as well as the timing feature, too.(does like, 15, 30, 45 seconds; then 1 5 10, etc...minutes, up to 1 hour). Alarm is a pleasant sound, too.