+1. We used these in Moab last year, and when the manufacturing plant manager at my work was looking for a radio solution, I recommended these. She asked that I order a couple for testing, and they loved them. They now use six or more across the factory floor, probably more in the future. (Plant is about 300 people.) I know a mfg plant is not exactly what they were designed for, but they still work very well.
There are cheaper solutions out there, but nothing seems to work quite as well as these.