One of the GA flight rags, I think it was Aviation Consumer or something like that, did a review of Panther and one other in-the-ear headset. Bottom line I remember from scanning the article, the Panther worked, but with a lot of caveats like: custom ear mold, audio one side only, sometimes garbled transmissions, the fact that EVERY sound is transmitted to the intercom (can't just move that boom mike away for a sneeze, burp, etc.), and the unit sometimes just stopped working and then started again. The other brand, which had dual audio, a boom mic, and a choice of custom molded or just foam plugs, was apparently a lot easier to use. Last month's issue. It was lying around my FBO is where I read it.
I'll stick with my DC 10-13.4's for awhile, but I think my wife would definitely go for a non head-set solution.
Good luck.