I have been using these 3D glasses with my new Panasonic TXL42ET50B and they are wonderful. They're really comfy to wear (even over the top of my regular glasses) and they're very light. This makes me weary that they could be broken easily, but I'll just have to make sure I don't leave them lying around on the sofa! Charging time is very good, you can do a quick charge for 2 minutes and they last for ~3 hours. They're bluetooth as well, very easy to connect to the TV and set up to use. Very similar to the way playstation controls work, pair them once and they just last for ages. If you charge them for 30 minutes, you'll get 25 hours of use. So give them a good charge once you get them and you'll easily get several hours of 3D movie watching time out of them!
The quality of the 3D is very good as well, so there's not many things to complain about. I think I'd just agree that it would be great to have a hard case with the glasses, but at the moment I'm happy just putting them back into the box to keep them safe.