Wanted to know their design, how they react to their users, accuracy, et cetera.
it wont come with a safety, the hammer is the safety, most people dont understand why guns dont have safeties, but if you are drawing a gun, all you need is one other thing to have to do before you fire. With a compact your going to have around an 1inch shorter barrel, which means the accuracy will suffer at ranges, but that wouldnt be an issue considering if it is used for self defense, most problems occur very closely. I said in a previous post that firearms with hammers like the p220 will create a very heavy trigger pull on your first shot, normally around 12lbs, which is significant considering the rest would be around 3-6lbs. This means your first shot will more than likely be horrible, id really recommend a firearm without a double action, it will truly be the best firearm wanting to train, with the safety factor aside. If you have children or people who arent gun savvy around the house, having the double action of the p220 allows that safety factor of making them have to pull that trigger hard before it will go off, as its drawing that whole hammer.
I've really heard nothing but praise from Sig Sauer firearms, they are world renowned and the p220 is used by police agencies around the world. As for other the ergonomics of the grip, or the accuracy, or the action feedback i really cant comment on it too much as ive never fired it, only heard of it being spoken about at the range by other owners.
On a side note, If you lived near me, which i dont think you do, i would provide you firing lessons or help you learn to shoot. I'd rather train someone with right way then allow someone to self train and learn incorrectly.