[ronin_01r1]

i have the zumo 550. no problems or complaints so far. i like the large bright screen so i can see it easily while riding. i use a ram mount attached to the fork. as ffej said, they maid it with bikes in mind. controls are big, easy to use while wearing gloves, buttons on left side, resistant to vibrations, water proof IPX7. there are several models out there that are water proof. the only downside i can think of is that it is a little bulky, otherwise i think it's very sturdy too.

i recently tried another garmin model i got from circuit city for about $250. i tried it for a weekend and didn't really like it. one thing i noticed was the time it took to recalculate the route after i took a wrong turn. it sometimes took long enough that i'd just about miss the turn it wanted me to take next. this was in miami with faily clear skies. it also took longer than my zumo to pick up a signal too.