As someone who had same dilemma with the 2016, I would skip the nav this time around if I had the choice again .... here is why
The NAV itself looks great, the graphics are good, the integration is good and everything works so no complaints about the unit, and it does bring benefits (setting home location for charging etc) ... BUT
- Traffic does not work unless you intend to continue with your XM subscription (plus traffic subscription) past the 3 month trial date, and Sirius didnt even want to turn it on for me in the first place !
- Traffic avoidance (in Toronto at least) is still as bad as it ever has been with my previous standalone navs from the last 10 years. They still use NavTeq data (or equivalent) and although things like roadwork and such like is pretty current, the traffic itself is 20-30 minutes behind (at least) and avoidance routes are terrible ... Not sure if you are in the GTA or not but I drive the 401 every day and in evening rush (eastbound) it always tries to send me off the highway and down Eglinton Ave to the Allen Rd instead of bearing with it and staying on the 401. Eglinton is worse than the highway at that point of the day, and if you are in the GTA you know that much of it closer to the Allen is a building site for the new crosstown LRT. On bad days, Waze started sending me up the 427 and along the 409 which sounds stupid but is actually a very good route !
- Map updates will cost you nearly $200 when released.
I have ended up using Waze most of the time on my iPhone 6S Plus (so decent screen size) with Apple Maps via Carplay or Google Maps on screen as alternates. Android Auto should have Google Maps when integrated and maybe both will one day get Waze .....