I bought 2 of these locks back in July 2020. They are easy to set up and easy to use. However they have connectivity problems at 50% battery levels and battery's need to be changed soon after. I have had these locks for 6 months and had to replace both units batteries 4 times already.  That's 32 double A batteries in 6 months.  Also, the back door is almost always controlled manually, so it dying fast is really bad. 

All in all it is a good lock but I am going to replace both due to the horrible battery life.