Suunto M9 is a GPS wrist watch. My wife got me one 1.5 yrs ago fo bday present on the recommendation of one of my sailing friends. Highly highly highly recommend not getting one. You can get a decent regular watch and then a foretrex 101/201 for less total than one M9... hard to program, no start timer, lags several seconds behind actual speed. I don't think you can beat the foretrex for its value and performance
M9 actually has a start timer and in it's start mode it tells you also how long will it take to get to start line with current speed if the line ends have been defined before start (the timer functionality is lot better on M3 though i.e. better/louder sounds and easier controls) and personally I haven't experienced lagging. IMO biggest problem is how long will battery last, if GPS is tracked most then the battery will end in about 3 hours, I suspect that you have longer frequency and thus you have some lag.
IMO all it's problems are related to small size though, foretex is lot bigger hence bigger battery, easier to get hardware in (i.e. cheaper to make) and easier controls.
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Valtteri
