I purchased this deadbolt to replace a 20+ year old Schlage deadbolt that originally came with the home.  Installation was a breeze; any home owner or landlord can install this in under 10 minutes with simple hand tools and a drill.  I bought this product in particular for the reputation Schlage has for added security and solid feel to the unit.  The lock/unlock action is tight and smooth and gives added reassurance.  The price was a bit higher than other units at the store, however, I feel that I will get many more years of headache-free use from this product and feel it was well worth the marginally higher price.