I've never really seen the point of a stop start button, seems a complete waste of time if you have to insert the key in the ignition anyways.
I have to admit I do like the keyless entry on my Suzuki Swift, you have a normal transponder with integrated key for emergencies. So long as you have the transponder in your pocket then you just walk upto the car press a little button on the door handle for unlocking, great in the rain and saves fumbling with the key and then you start the car with a twist barrel on the steering column. The car locks itself when you leave it, although you can lock it manually. Seems better in my mind than the start/stop button as you don't have to get your keys out
