In short if your looking to rekey more than two locks YES! The cost of quality lock hardware has gone up significantly in the last few years and the quality has gone down, so re-keying is a great alternative. Although they may have self re-keyable locks now they simply don't hold up. Just as a precaution before I start offering a new product I always use it. The new Kwikset smart key locks that I installed on my home only lasted 18 months. The average cost to rekey locks is somewhere arou...