I just ordered one of the version 2 models. I have an older GPS with the SiRFStar III chipset and it is awesome pulling in a signal... even inside a room with no windows. I hope the MTK chipset is equal to that.

But the old GPS won't fit on a keychain like ver 1 and ver 2 will. I see no reason why you would not be happy with ver 1 either. I suspect performance will be about the same. Thought I'd try the MTK version and see how it performs.