I'm on the fence myself. And yeah, when the most used app is the maps for transit directions it does leave a bad taste to go from something that worked great (most of the time) to something that doesn't work for your needs at all. Am I still able to take phone calls? Sure, as long as I'm not at the office though I blame that more on AT&T and working right near the river walk in San Antonio, but the local bus company has said their maps addon won't be out until October at the earliest, March of 2013 at the latest.
And how many people have switched to Mac due to an inferior product feeling? Sure you can still use the computer but if one of the main purposes of having it doesn't work for your needs, why keep using it?