Yes,
I use it , For on the Boat, the Car and On the Bike, and I love it,
I have had it now about 6 months and it was well worth the money.
The only thing is the maps are a a bit $$$ but then again you get what you pay for.
Also I recomend to if you are going to use it for both Road & Water then you get 1@2 extra memory cards (256mb) for loading the extra maps etc....