The Good
The face is huge and you can't miss the numbers even when it's really windy and wavy. The modes are easy to use and you can quickly change from 3 minute sound starting to 5 minute or other alternative starting sequences.

I like the automatic count up feature after the start except that I usually end up hitting the stop button by accident while trimming sails and crossing the boat. The sync feature is an absolute must have for sailboat racing and I can't tell you how many times it's come in handy. It's one of the most used features because it's easy to miss a gun in extreme conditions.

I also like the fact that it functions as a watch with both 12hr and 24hr modes. You can quickly switch between the timer and clock without any disruptions. The sound signals are nice except that you can't possible hear them with 50 laser sails flapping in 15kts of wind. When it's light air in a big fleet you can hear tons of Clearstart watches beeping almost perfectly in sync. .