This is the one I have and it's a game changer for me. Something as simple as not having to plug the phone in really pays dividends in terms of overall convenience.
Yea it's good (and expected) that prices would come down and these dongles would become more available. I wouldn't hesitate to pick up any of them that are out there now... that one, AAWireless, Motorola M1A... or the equivalent dongles for CarPlay if I had an iPhone. It's just too convenient for me to go back to plugging in, especially considering where our USB port is located.