Personal opinion, but the fob in my pocket for the S is a lot easier to use than having my cell phone do the job on the 3. Punch - punch = unlock. That's it. From 50 feet away. Blue tooth is iffy on the 3, and several times I've had to go to the app and punch in the code to "use phone as key". IF blue tooth works, well, it takes longer. I've had to wait outside the car (with people wanting to "see how it works) for several seconds. The card works quicker.
I'm supposing there will be an OTA update and fix this.