Push start button looks cool. You can definitely go for it if you are really interested in it.
What I feel about integrating a push start button is we will feel really good and happy about it. But most probably it will last only for a couple of weeks or months
after that instead of using push start button we will rely on the key start method itself since this is what more convenient to use because we don't want extra time or extra movement for getting our hand to the push start button from the key(Since we need to turn ON the key ignition before we can use the push start button to fire up engine.)
Since it is not a damn costly job, there is nothing wrong in doing it.