We have been using this system for a year with no problems and the other even longer. We have two BLX88 receivers in two buildings about 200 feet apart and are usually set to the same channels so we can swap mics quickly (we don't usually use both systems at the same time). The receivers are high up (10-15 feet off the ground) and the mics will actually work through walls at that distance! We have a cell tower that has occasionally caused problems with our previous wireless systems. No longer. The battery life is excellent.