Once charged & paired, I'd call the sound quality adequate rather than startling. For the price, I'm not complaining though!
I've used this between my Panasonic P42V20B plasma & a pair of Sennheiser MM450s. Once I had set the phone out volume on the TV to a suitable level, I use the volume controls on the headphones.
Pairing was simple enough - I'd suggest that this device will work with nearly all BT phones so don't worry about them having to be 0000 coded only. The device comes with a USB charger & lead & the socket is for a mini USB plug, not a Micro one. I've not tried pairing to a 2nd pair of phones but the instructions state that it's possible.
The transmitter is light enough to let dangle by its 3.5mm lead. Maybe not the last word in audio quality but it is fairly cheap. Recommended.