Summertop: waas is a network of ground stations of which the coordinates are known exactly, those ground stations are used to calculate a correction on the gps data (due to atmospheric noise, slightly movement of the satelites, etc.) .. the ground stations are in the usa .. the waas signal cant be received everywhere .. and even if it can be received outside the usa i am not sure the correction is correct for other coordinates ... so waas is nice .. but not something i would select the device for (without waas the accuracy is about 15 meters, with waas about 3 meters)

i had a look at some of the exercizes .. fun :)
the geko 201 also has some gps games on it .. can be fun to play with :)

i am not sure about the maps ... i think i would like it and it would definetly be a pro .. i wont be able to use it in costa rica i think .. but i would be able to use it on other trips for sure . so for the moment i dont need it .. but its definetly a big pro (if it doesnt raise the price too much :))

i read a dutch review who said it worked nice for him .. so it works outside the usa as well *phew* :) .. i read some more reviews and it seems the battery life is slightly less than the 12 hours which garmin claims .. can you switch batteries without losing data ?

what were you experiences with the device you used ? (which brand, type, what area, what occasion ? ;))