If you are recoil sensitive then you might find the G23 to be a little bit sharp in that department. However, it really isn't all that much. Yes the gun does recoil but no, it is not bad. The Glock 23 is a fine self defense sidearm and you could do a lot worse, but not much better with this as you primary carry gun.
In the final seconds of your life, just before your killer is about to dispatch you to that great eternal darkness, what would you rather have in your hand? A cell phone or a gun?