I used the Touring Plus on my summer tour from Missouri to Florida and back. I rarely used the navigation features, though. I planned my routes with paper maps, Google Maps, and Apple Maps, and used the Garmin as an on-handlebar map.

Limited preliminary navigation testing before I left on tour showed that the device selected adequately bicycle friendly routes, by not as good as a local familiar with the roads would select. That's to be expected, IMO.

Whenever there were discrepancies between the Garmin device and Apple Maps, Apple Maps, which uses TomTom data, turned out to be the correct device. To be fair, my iPhone was a backup device once I was on the bike, so there weren't any situations where I thought it might be wrong, requiring me to double check the Garmin. At any rate, that's a knock on Garmin's map data, not the device itself. The maps on the device can be updated.

I did try using the navigation features of the Touring Plus when I was trying to find a legal route to ride from Mount Pleasant to Charleston, South Carolina. The device doesn't recognize bike paths (or, at least, I have been unable to figure out how to get it to recognize them), and the only direct way into Charleston involved a bike path along side the bridge of a freeway. The Touring Plus was unable to find a route, and suggested I add more waypoints.

Battery life was sufficient for a day's ride, at least if I remembered to turn it off when I was stopped to rest, eat, etc. I used an external USB battery so I could charge it while I used it when necessary, but the internal battery was rarely exhausted before I stopped riding.

The Touring Plus essentially works like a car GPS instead of a cycle computer. If that sounds useful to you, then you'll likely find it to be a worthy purchase. If you're looking for a cycling computer, then I would skip the Touring and Touring Plus. They won't fit the bill. I want the bike version of a car GPS receiver, so I am satisfied with it. There's room for improvement, but that's going to be true with any gadget.

Edit to add: I did discover a bug in the Garmin software. When I crossed over from the Central Time Zone to the Eastern Time Zone, I lost record of all of the day's riding from before I crossed, and also my custom configuration of the trip pages were reset. I don't know if the unit was on or off when I actually crossed, as I accidentally forgot to turn the unit back on after stopping until a few miles down the road a couple times that day. As I crossed back over into the Central Time Zone, I intentionally had the unit switched off. Upon turning it back on, the day's data was still there, but the trip pages were back to the default configuration.