One of the phones biggest selling points to my wife is free turn by turn. I haven't taken the Sprint plunge yet, but was wondering what those of you thought of the two free Nav options on the Evo. If Google Nav is as good or better than Sprints, I could probably still go with a Nexus One on Tmobile. I had Sprint in the past and I found their data speeds to be dreadful and their signal always did poorly in buildings. Thanks for any input.