I got this product because I swim laps twice a day for exercise and I need something to help me pace myself. This product does that (it does exactly what the literature says it will do) - for that I would give it an A+.

HOWEVER, when I first opened it up and looked at it, I thought the weak point is the holder used to attach it to the goggles. It is plastic, has three prongs to hold the Tempo Trainer, and a clip on the other side to hold it on the goggle strap. I was right. After using it two months, I noticed I couldn't keep it on my goggles without it slipping off and falling to the bottom of the pool. The clip had fatigued and stretched so that it is no longer tight enough to stay on the strap. I jerry-rigged it with some electrical tape to keep it on, and that works after a fashion. The clip gets a D.

I got the idea I could contact Finis the manufacturer and see if they would sell me extra clips, so I looked them up on the Internet - not very hard to do. I e-mailed my inquiry to them (to two of their contact addresses) and both my e-mails were returned, so I decided to contact them by phone. After several unsuccessful attempts on one day to get anyone but an automatic answering system, I gave up. (This includes trying to get someone to talk to me in sales).

The second day I tried several times again and got someone. The representative said they don't sell clips separately and I'd have to buy a whole new Tempo Trainer (approx. $30) if I wanted to get a new clip. She added that they had had other problems with this item - mainly the electronics die after several uses. This hasn't happened to mine, I can only go by the company representative's word.

SO - great idea - substandard manufacturing. Unless you have electrical tape and are one of the lucky ones to get one that works - maybe you should think of something else if you need this kind of timer. 2 stars

My daughter uses the tempo trainer and likes it. Other reviewers said that the clip is weak and breaks. This might be true but my daughter and other swimmers on her club do not use the clip. They place the tempo trainer under their swim cap. 4 stars

If you like beeping in your head, this is the product for you. Easy to speed up. Only drawback is when you turn it on, it advances, because that is the same way that you do advance it after it is turned on. Just a minor inconvenience. 5 stars

I'd read the previous review noting that the clip (used to hold the timer onto the goggles) weakened with use. But I thought that, knowing this was the case, my daughter (for whom I purchased the gadget) could be extra careful to not 'stretch' the clip.
However, we didn't even get that far with it. As she was removing the timer from the package (hard-shell clear plastic), one of the three prongs that holds the timer itself into the clip snapped off. Meaning, of course, that the timer will not stay on her goggles because it falls out of its holder.
We will try gluing it in place and see how that works. (To be honest, I can see no reason that the clip couldn't just have been permanently affixed to the timer itself in the first place.)
But really ... the quality control on this (the only gadget of its type, so far as I can tell) is horrible. For an extra nickle they could probably have used a better quality, less brittle type of plastic for the casing.
Another minor annoyance is that there is no way to control the volume, and the beep is rather loud.
Great idea though! If we can repair it, it should help her swimming alot. 2 stars

Just a quick addition to reviews below. I use this product and I find that by placing the beep on certain parts of my stroke, I can focus on that part (elbow, catch, etc).

For the comments below about the broken clip, I put it in a swim cap between the cap and my ear. Problem solved, and I prefer this solution as it holds it securely in place. 5 stars