i use the garmin zumo 550 and i feel it really is an excellent bit of kit.sure i too enjoy my maps and always will and certainly checking out terrain and route finding skills using a map, are part of the fun for me at least of travel and biking and combined with a gps give you more infomation to select from when you have to make a choice.i always carry maps with me and if for any reason the gps becomes unsure of itself i carry on with the maps etc.it does happen the the gps will stumble over the info it is reading on occasion don`t forget its only as good as the maps programmed into it.something you can have control over, is how it
calculates the routes it uses and depending on your input you can eliminate some of the false readings, by imputing a route with a begining a middle and an end for example and a few poi`s you are then directing the map programme to follow your route.it takes a little practice and sometimes you will still get wrong directions but in a way depending on where your head is at it might piss you off but i still rate it very highly for all my trips
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