Yes the TomTom & Magellan are hard to beat for ease of use. Had a Magellan in my truck for about fifteen years and the wife currently has a Magellan ; super user friendly !
Bought a Garmin 660LM several years ago, they were fairly new out then. Great unit with many really good features. But as others have noted, very pricey. I'm currently finishing up a mount for the "6". Going to run the audio cable into the left pocket so I can play GPS stored music & turn by turn through the bikes audio.