Summary: This product is superior to the AT&T comparable product I've had for several years. Set up was fast and intuitive. Good thing, since it came with no manual. Also missing was the around-the-neck holder for the earphone. Returned it and got a fast replacement, configured exactly the same way. Amazon Cust. Serv. folks kindly gave me the number for the supplier, whom I called at about 10pm EST.
Summary: I have used it for a couple of weeks and like it so far. Before, I had two headsets, one for the telephone and one for dictation software. Now with the push of the button I can go from one to the other without having to change headsets. Very convenient.
Summary: The sound quality is pretty good, as is the range. I can get up an walk across the office floor (50 - 60 ft) and keep connectivity with no problem or noticeable depredation in voice quality. It works just fine with our Cisco 7900 series phones, but it took a little tweaking to figure out the right setting to get it to work. It also works fine with our Cisco Softphone software and with Skype.
Summary: This is probably the best wireless headset available now. Excellent sound quality, great range, many controls over audio tone and loudness in the earpiece. There are only two minor problems with this headset: It's a little finicky to put back in the cradle, and you get just the slightest echo of your own voice in the earpiece. (Very slight, and can be ignored easily, but the Plantronics does not have these problems.