I have the ComSTAR FlexMax base station with three Compak beltpack/ultralite CS headsets. The kit came with battery charger and a battery for each of the beltpacks and two for the base station, which can also run with an AC adaptor. It operates in the 1900MHz PCS band and there have been reports from various users that it picked up other communications; I haven't had this happen yet.
1. The range is quite good, I had our lighting guy walk to the end of the parking lot outside the theater and he didn't get any drop out on tx or rx, it was about 1000 feet away. This is without external antennas on the unit, but it's very sensitive to placement height. I usually put it on top 2 8-space racks sitting on the work surface in the sound booth.
2. Sound quality is only acceptable at best, volume on the Compak, even with the request to max the output when I ordered it, is not loud enough for when the stage volume is really loud. I have no info for the all-in-one headsets.
3. Compak talk button functions as a mute, and it's only latching rather than PTT. Many of our users forget to mute and we'll have to remind them to get off the line.
4. Ultralite CS fit is not too good, need to bend the metal on the headband but it feels like it won't stand for much of that.
5. Batteries for the Compak last about 5-6 hours, but they're cheap enough to buy spares and replace at intermission.
6. I ordered with the option to interface with a wired intercom, but have not purchased the interface. Eartec lists specific interfaces for Clearcom, Telex, etc. and they're $450 each. Was thinking I might be able to mod one to use a custom output wire specific to each brand.
Not sure if I'll be breaking the board rules if I put in a price range that I paid, but it was a lot cheaper than a ClearCom or Telex system with the same number of wireless packs. My shows are not so mission critical so it works for me, I'm sure it would not for most on this board.
