I'm rather disappointed with the routing on my RV760. It ignores all the preferences I set (avoid dirt roads, avoid u-turns). The routing methods don't seem to make any difference. Fastest, shortest and there is no more "preferred" option.
Going from one major city to another, it seems to avoid major roads and finds the a narrowest streets with the most turns to take me down, again, ignoring the respective fastest/shortest routing method I had chosen. It seems to be stuck on shortest.
It's the complete opposite to the ten year old Garmin Nuvi I bought for $100.
The Nuvi I will trust to route me somewhere using a reasonable route... the RV760, NO WAY. Luckily I've not actually actually needed it yet.
That said, I do like the huge screen, and really like the voice commands and huge POI database. It doesn't take data like Google does, it doesn't require cellular coverage, and I don't have to fumble around to unlock my phone (ALWAYS keep your phone locked folks, always.) Also in RV mode, I like how it calls out changes in speed limits, a good warning for speed traps like when the limit drops suddenly from 55 to 25. It also warns if I turn down a road where clearance data is unknown.