Read up on Medeco. An expert lock smith might be able to pick it in his career, once. That's an $80 lock. Now look at Kwikset from HomeDepot for $11. An amateur can pick that lock in 2 seconds flat.

In short, the Medeco lock basically has every deterrent you can put into a lock that the industry knows about. Medeco to Kwikset is like a major payment processor's portal to a Wordpress site with a shopping cart plugin for seeing specialty cat themed oven mitts. You get what you pay for if you high someone that knows what they're doing.