I would recommend against that specific model. I bought it last summer with high hopes, but while it does work as advertized it takes more than a minute to change the time frown.

Fine if you want to always use it for a given interval, hell if you want to use it for very different things (you have 30mn to do your homework, we are leaving in 5 minutes, you need to read for 20mn...) as you have to go through a rather lengthy set-up sequence every. single. time.

A deal breaker for us. It has been used twice and collected dust since then.