I have two of these locks at my office.  I did not do the initial install as I am totally mechanically uninclined.  However once installed they are easy to re-program, change the batteries, and operate.  One of locks stopped functioning after a period of time.  Customer service over the phone was able to assess the problem and sent me a new lock.  I installed the new lock no problem.  Company clearly stands by their products.  The batteries have to be changed fairly frequently but that is understandable as the locks are on office doors and we have people coming and going constantly.  100% I recommend this product or another product from Kwikset.