Years back I learned both Krav Maga and Aikido techniques in the police academy and have used them both in the field since then. Having said that, we live in a PC world where going straight for the throat can get you sued for everything you own so if possible I tend to stick to my limited Aikido training.
For those of you that wear a gun on your hip, Aikido will most certainly help you keep it there.
Do whatever you feel you need to do. However, blanket statements based on your own personal experiences with Aikido won't get you a cup of tea and a biscut.