Update 1/2007. I have had two of these now and loved them but they have only lasted 3 weeks each and then died. The company Sportcount says they are coming out with a new model that fixes the problem (some gasket in the inner workings of it) and they will replace when they come in late Feb.
I love the product enough to wait for it, because when it works it works great.

I was hesitant, having tried watches that had lap counters and hearing from others about other lap counters, but I am very impressed on how well this works.
Easy to swim with and very easy to use.
I love the review feature it tells what your fastest and slowest lap are and then you can review each lap.
Just push the larger button with your thumb as you turn and you feel it click.
Now I don’t have to try to think about how many laps I swam.

The only problem I had was the first one died after 3 weeks but I got fairly quick replacement from the company.

I use this as a swim lap counter and it is terrific! The one hand operation is very easy to do without disrupting swim stroke, and the display is simple and easy to use. My only wish is that it had a back light when the counter button is pushed because if your swim goggles are at all fogged up it can be a bit tricky to read the lap count underwater. But overall an outstanding product.

I love this little device. I wear it when I am running and it serves as both a timer and a lap counter. I used to lose track as to which lap I was on, which can be very frustrating. Also, you can’t quite tell from the picture, but this is a small device that is worn on your index finger – then you just tap the button with your thumb as you complete a lap. Other neat features is that it gives you your total time / number of laps as well as your fastest lap, slowest lap, and average lap time. It does all these things with just one simple button. I wouldn’t run without it!