From someone who avoided the Zumo's al together...
I managed to buy into a StreetPilot 2820 as my first Automotive GPS.. (had a few hiking ones.. that I used for road use before)
When Garmin decided to do their own chipset, and started the Zumo's.. I viewed it as a major step backwards..
My 2820, however, perished in the fire.. and in any case was short on memory, and didn't allow external memory cards.. so trying to replace it with a used unit was out of the question..
My vote was to wait to see what the successor to the 660 would look like, and I have been using my phone and a hiking GPS in the mean-time... but as time went on, I decided that wasn't working so well... so I bought a 350LM
So.. for me it works... I've adopted Basecamp... it does stuff that I now value that Mapsource doesn't... I really like the silent route-points feature that basecamp and the 350 give... I like the modern road speed stuff, and the speed cameras.. not sure if I will pay Garmin for the speed cameras, or go back to my POI way of doing it..
I'm not really missing the fact that I can't load a bunch of tracks into the GPS.. I suppose I can convert them into routes if I really want someone's tracks as refrence.. perhaps I can figure a way to hack a track into the unit so it shows up as the last track... perhaps not.
What I miss the most is the remote control.. I had it mounted in my hand-guard, and changed the zoom level all the time on my SP.. (I use North-Up 2D maps to navigate) I've moved the Zumo onto my handelbar Ram ball.. in hopes that I can easily reach it and change zoom whenever I want.
But opinions are like rats around here.. people still love the 550.. and lots love the 660.. and it seems Garmin take away something "vital" every time they bring out a new one.. and people get obsessed about what they loose, and don't pay any attention to what is new...
I chose the 350 over the 660 because the 660 is over 3 years old and needs a refresh... But I've come to terms that Garmin will never build a GPS that meets my expectations, because their marketing team don't want to... they prefer manipulating the market for whatever reasons please them..
Al...