I just bought this timer a couple of weeks ago. Have used it 3 times so far and needed to put my $.02 in. I thought it would actually be bigger, but I have no complaints now that I am able to take it to a park or track and train with it. I usually listen to my ipod when I train outside, and this little gizmo actually has a vibrate mode that lets me know when my interval is up. The beep is loud on it too. I was using a tabata gym clock I had downloaded online, but I could barely hear it. I actually used it in my last video, that I posted in my last post. I highly recommend it, especially if you train using intervals– and if you’re not, why aren’t you?– and the best part is it’s only $20. You can order one at www.gymboss.com.