I work in the industry and I've been a little confused about UConnect4's ETA and Routing. I've done some benchmarking with a Garmin standalone, TomTom, .Apple Maps and Google Maps and UConnect 4 and connect, on a 1000 mile trip will always have an ETA that's 1 hour more than every other company. All other options, like UConnect 4 have live traffic. I pay for SiriusXM Guardian and live traffic services so the UConnect should have a close time. When I let UConnect do it's thing on a drive from NH to TN or FL, it rarely avoids traffic and I've looked through the settings. After 20K miles of road trips in the first year with multiple maps going at once, I've decided to stop using the built in navigation system. It's inaccurate and the slowest of the bunch. Costing me an hour of driving because it refuses to take me on side-roads is frustrating.
I do LOVE the built in Gas Prices through Sirius though. that's helped me save $5-$8 filling up the 33 gallon tank when I'm on a road trip.