These devices get high marks in my book, though I still wish that Microsoft had used the same design for their own headsets. It would have made using any headset you want a breeze from day 1, and would have for a much more durable and longer lasting device to begin with.
I wish that devices like the Motorola "Coaches" style headset came with one of these type systems. (They might, but as I haven't spent the $40 on such a headset I can't say for sure. Those headsets do look nice, and look like they're more sturdy, but they aren't cheap and don't offer any more functionality over the originals so getting one is low on my priority list).
Lest I forget, standard disclaimers apply.... My opinions only, not a shill for Microsoft or Datel (nor any other gaming related company), etc.