Does anyone use the Kwikset 816 lock?

[Jacob A.]

It looks like they give only one copy of the control/master key which has the words "Do not duplicate" on it. I was able to get a duplicate from Home Depot, but the duplicate would not even get into the lock. I would have to get a locksmith to make copies and that is easily $100+. Does anyone use this lock and was there a simpler way of getting a duplicate? Why does Kwikset make it so difficult? The reason to get buy such a lock is for a landlord who owns multiple properties to have one key.