We've had the 760 for about 9 months now, it's served us well on every trip.
I don't like the Garmin PC trip routing software "Basecamp". I like to route our trips on the computer so I can easily add stops or change the route it sends us. I think the software is horrible, but like someone said there is a learning curve and maybe I just haven't gotten it yet. I like the Good Sam on-line trip routing, but that only exports to their GPS unit, not any other ones (as far as I've been able to figure out at least).
One feature I like on the 760 is the "up ahead" which allows you to customize what you see, well, up ahead. I have mine set for rest stops, gas stations and restaurants. It shows an icon for each with the mileage to the next one. You can select from some pre-sets, but also do a custom search. I tried "Flying J" which was randomly accurate. I also tried "campground" or "camping" with absolutely no luck. Being an RV specific unit I do wish "campground" was an out of the box choice, but maybe I just need to plan my road trips and overnight stops better.
The lifetime map updates are an excellent feature, as well as the live traffic "where available" which is the major cities. The Garmin website links to the traffic areas. I recommend updating your unit as soon as you get it, and regularly after that. I make sure I update it before every major trip.
The weather is a "for fee" service but I can't quite figure it out so will spend some time with it. I believe it requires the SmartLink app to connect via bluetooth to your smartphone, which I have installed and paired with the 760. I purchased the weather option in the SmartLink app and can view local weather or road conditions in the app, but can't seem to get that information consistently on my GPS unit. Once I can figure that out I'll be happy.
I started out with the Garmin bean bag mount, which is great but tended to bounce around on my motorhome's dash. I switched to the Garmin friction mount before our last 2,000 mile trip and can't say enough good things about it. It works perfectly in the RV and towed car as well.
I have a backup camera monitor in my motorhome so cannot comment on that functionality of the 760 as I don't use it.
Overall very satisfied with the Garmin 760.