Cecco,
ORBI definitely has it's risks, but it's not as bad as it once was. The above posts are generally accurate, in that you will be vectored to a standard ILS, but it the weather permits, you can ask for a visual. The benefit of this is that you can stay higher and faster than you might otherwise choose. If you're able to arrive and depart by night, all the better.
The biggest threat is that every man and his mate own AK47's and they have been know to fire at aircraft just for fun. Stay high (ideally a couple of thousand feet until as late as possible to mitigate the risk - you will have 12,000' of runway to assist you with that type of approach. On departure, carry out a climb at Vx for the same reason.
I would absolutely advise against overnighting outside of 'the wire' without professional security; even then, don't do it out of choice.
In spite of some of the above posts, some areas of the north are significantly safer than Baghdad. Erbil is considered the safest city in Iraq, but it's all relative!
If you want specific info, PM me.