My students nearly destroyed this in the first few days of having it in class. It was a small behavioral needs classroom and they were definitely still struggling with respecting other people's things and playing way too rough when they knew it wasn't a rough play toy but a lesson aide.For my own studies, I've had luck with a smaller pomadoro flip timer with a dial read out and color countdown bar, but even if it's got the volume up I'll sometimes forget it's there. This is painfully loud and startling, so you definitely couldn't ignore this and it's hard to stop one it goes off. So it lost a star for the abrasive bell and difficult stopping it, something that can be a huge interruption in class.I think if you have space for this or a classroom that doesn't throw things, and you/your students don't jump at harsh alarms, then this could be great. It seemed a little off, as in slow one use but fast the next, even with fresh batteries, but I don't think that it's a major impact for most things. Still, lost a star there as it was the only option I had for a benchmarking assessment day and had to figure out if it was fast or slow which made it all the more stressful.These are my pros and cons, decide for yourself but double check the seller because some won't return or exchange a broken in the box clock as a colleague of mine discovered.