The '10's have a different version of sync - not as all encompassing.
I do about 10 miles highway and about 10 miles city on my way to work - same on the way home, plus any driving at lunch time would be all city - and weekend errands - I have not done a road trip that would allow long stretches of highway. Also - It has been winter the whole time I have had it - so take the Alaska factor into considerations. Not sure where you are. (running your car 20 minutes before you leave work for the night really sucks gas, but better than being freezing for the first 20 minutes.)
I also went from a car getting much better milage, (99 ford escort) so it was a bit of a shock - but I knew that going into that I was giving mileage up for room, comfort, and wonderfulness. I love my edge and I am one of the few people that stay on this site that haven't had problems with the mft. Remember to take information on any forum with a grain of salt.
If you dealer won't let you borrow - look at the rental companies and invest in a couple day rental so that you can really try it out.