Edit: I originally wrote this review in 2018. It’s now 2021 and the timer has stopped working. The reason: my 2 year old toddler got a hold of it when my 9 year old son pulled it down off the wall. The plastic isn’t broken or anything. It simply stopped rotating on its own. My hubby had fixed it but now it’s stopped working completely. I would still recommend this timer, just make sure you hang it up high enough to where kids can’t take it down. As long as it’s out of reach, it should function perfectly and last a long time. I had actually started using it for my home gym as well. And since it wasn’t stationary, we got a little careless with it. In the future, I intend on getting a couple more of these. One for the home gym and the other for their homeschool. It’s quite practical and although delicate, extremely useful. Especially for those of us that loose track of time easily. It’s great for setting limits on TV time as well.Original review:We got the largest size and wall mount it above our computer in our homeschooling space. It has been the perfect solution for keeping us on task. My 6 year old loves setting the timer. He knows he has 30 mins of computer time and he sets it every morning after breakfast. When it dings, it's not annoying, but loud enough that it reminds everyone it's time for the next activity. My son now has a better concept of time. When it dings, he shuts off the computer on his own and we get started on Math. By far, one best purchases I've made for our homeschool. I am terrible at timing and routines. This helps tremendously. I don't think the materials ate partcularly long lasting. Seems flimsey. But my son isn't the most careful and it has withstood his use so far. I hope it holds up! Oh, also, you can't go all the way to 60 mins bc the red will overlap with zero and it will ding. Not a big deal for us. The only subject that takes us that long is phonics. I just set it to 59 mins.IF THIS REVIEW WAS HELPFUL, PLEASE LEAVE A THUMBS UP. THANK YOU ?