I've never had the urge / desire for a satnav, I use AutoRoute on my laptop in the truck but I have recently been using my iphone 4S with Navfree and View Ranger for bike distance travel and byway bimbling. I'm planning a couple of European trips next year and questioning whether I need a dedicated satnav. My iphone goes to sleep if it gets cold, maybe a new battery is required?, and I haven't found how to set a route with multiple way points. I'm looking at either Tomtom LM350 or Garmin Lumo 660, or are these too complicated for my needs? or maybe a 2610? Can you still upgrade the maps on these? I would like the ability to plan a route on my computer and then download it onto the gps device. Will these satnav give sufficient detail for greenlanning or would I be better with something like a Garmin Montana? I can still use View Ranger for recording my adventure.