I installed one of these on our front door, paid with the Addison handle set. Installation was fairly easy and took about twenty minutes. I did need a little help holding the pieces in place to screw everything together, and getting the long machine screws to catch on the holes on the back of the outside unit was a bit of a challenge, but once everything was lined up right it went together really. The action of the bolt is smooth and quiet, and it operates perfectly. The bronze finish looks great under both interior lighting and in bright sunlight outside. I'm very pleased with this purchase.