I have been using Kwikset locks for some time now (15+ years). They have been making master-keyed locks for apartments (Titan was the early name for this line) and now the Smart Lock line works great for my single family rentals. These are good because there are often more locks & styles of locks on a house and I can set them all to work with one key, how convenient. By following the simple instructions I am able to "rekey" a lock in under 1 minute, with only a new set of keys, and no tools. If you do not rush the process, you will be pleased with the results and never have to dis-assemble a lock again!