I use these (Sony DR-BT22) with my iphone to replace the AKG K26P I used with the shure iphone adapter cable. I found that they are identical in size and function (foldable, portable) and almost the same in sound quality, (which surprised me with wireless). They are not quite as boomy in the bass as the AKGs unless you swap in the AKG's leatherette pads for the Sony foam earcovers (a perfect fit BTW), then they are almost exact. They are light and comfortable on the ear, but the headband is hard plastic and needs a layer of foam to prevent pain on the top of your head with extended use.
I also like that they are A2DP so I can control the music (pause, volume, skip forward and back) and can be used to answer the cell phone as well (with a bluetooth transmitter on the phone) - all things that may not interest you. My wife has the Motorola S9 in-ear bluetooth with all the same features. They sound great but are too small for my fat head, and I prefer over the ear phones in almost all cases.
I think, like the AKGs, they have great sound for portable devices, especially at that price point, and I'm glad I got them and use them every day on my walk. But I agree with others that if you are just listening to music at home via a bluetooth transmitter on your equipment, then your money is better spent on an adapter for your favorite pair of headphones.
