The case is 3cmx3cm, so it is relatively small. The clip looks solid but heavy fabrics, it's not easy to put gently.
All buttons are to wear. The association in Bluetooth or from NFC worked on with my LG E-975.
All the commands available from the box work. Volume, stop, pause, forward and back. A sliding switch turns off the case. The headphone jack is 3.5mm standard.
The sound is apparently identical with and without. I tried with an intra JVC and an enclosed Sennheiser HD25-1. The impedance is not the same, the battery case may suffer.
Otherwise, the binding is 99% reliable. Sometimes I mute the connection but it stops after a few seconds.
I do not know the complete charge time, that said, it varies depending on the discharge and lampérage usb port. By cons, the battery takes over 5 hours minimum.
To conclude, this bluetooth case is a good product, practical, small, reliable (so far).
Use: Bike and car.
