Re: "keyed-a-like" locks and keys: Pros and Cons?
I would have thought that the advantage of having one key fit all locks is that you don't have to carry three different keys with you and once you have a key you can enter any through any of the doors. - If the locksmith is keeping the security code then it means you can't just go to any locksmith to get additional keys cut but have to go back to the original and pay whatever he charges - this might be ok, might be worth asking him.
Thumb turns I don't like (and this is just a personal opinion) - the advantage is that you know that when you close the door behind you it will always be locked - i.e. you can't inadvertently leave the house open. However, this means that if you leave the house and have forgotten your keys you are definitely locked out, and if you have the fancy sounding "key alike" system then you are definitely locked out of ALL three doors!!
I prefer a system where I have to have a key to lock the front door - it means I never forget the keys!
efm