I have one and like it very much. I think dedicated H/W sitting right there on the dash is better than an app on a cellphone or tablet. The live traffic is nice. I have 4 other Garmins and am very happy with them in all my vehicles.
Depending on where you are, you might want to turn off the toll avoidance... I'm from Canada and one time it wanted to add 1000 miles to my trip to avoid the $6 bridge toll at the border crossing by going to the other end of Lake Ontario where the is no toll northbound.
One minor nit is that in RV mode, it calls nearly every bend in the road a 'sharp curve' but I do like the announcement of speed limit changes.
I don't think much of the bridge clearance data... there's a 10'-sumthin one in Olean NY that would take off over 2 feet of my RV (yes - 12' 10" is the configured height) and it doesn't make a peep (however, I haven't been able to find that one in any clearance reference so maybe not their fault). I wish you could explore bridge heights in the data file but I've found no way to do that.
2015 Rockwood Signature UltraLite 8282WS Platinum, GY Marathon LRD, TST 507RV TPMS
2005 GMC 2500HD CCSB D/A, Curt E16, Prodigy P2, Garmin RV760LMT w/BC-20 b/u cam