It was Johnnie Walker who got me interested in Bluetooth headphones. I bought the same Sony MDR-10RBT model as he did and I'm pretty pleased with them.
I have to listen to a lot of radio previews in a week to write about them for The Guardian. I can pair these headphones with phone, tablet, laptop or iMac and can then wander fairly freely while still listening closely. The signal starts to break up if you move too far away from the source but within reason the connection works very well.
If you've got them paired with your phone and you get a call while listening you can press a button on one headphone and immediately you're through. Not sure I'd use them if I was working in an office (might feel too much like a minicab driver) but at home they do the job.