The most useful feature of this software is that it helps to manage all things related with rental units, tenants & landlords very easily without any technical knowledge required! I think its best thing about commondoor which makes me feel so much happy when i am using their service because they are providing every kind information regarding my unit's status along other important details as well like rent payment date etc., So far nothing negative from our side but we can't get some new features in future updates or enhancements by them since there were more focus towards android users than iOS ones only (which was also available). It will help you find out your tenant problems at one place while managing multiple apartment complex/building via single dashboard system provided through online platform too if not installed locally!!