Someone may have mentioned it already and I missed it...
As for dead-bolts... Great! A crappy deadbolt is better than no deadbolt.
However, if you want the toughest deadbolt in the world....
THIS is what you need!
http://www.mul-t-lockusa.com/productlist.asp?catid=22
On the bolt itself there are ball bearings... Once the bolt is fully extended and goes into the strike, the ball bearings stick out on either side and the bolt becomes connected to the strike.
My father and I are Mul-T-Lock dealers and we have sold TONS of these deadbolts... They are the toughest deadbolts we have ever encountered.
We have a customer that owns a local car wash that had us install one of these deadbolts on the room that holds the change machine.
Before this deadbolt had been installed, the coin room had been broken into.
Between the frame, the door and the lock itself my dad counted about 30 strikes.
Since the above pictures, another break-in has been attempted without success.
NOTE: This lock is still fully functional.