I purchased this headset because I had a scala 500 previously and was impressed with it (especially for the price).  This headset however turned out to be a disappointment.  I had used it with my Nokia 9300i, a BlackBerry and my land line using a Bluetooth adapter.  This headset can switch between two phones which is a big plus since I have a phone for work and my own personal phone - but it doesn't always work.  It usually works the first time and then doesn't reconnect until I power it off AND turn off the bluetooth on the handset and turn them both back on.  I did get the switching to work with the land line and my Nokia, but the headset didn't work well with the land line - too low of a volume.  There are also times the headset will disconnect for no reason although this only happened once while I was on a call.  I also get a lot of "can you repeat that" or "I can't hear you" which again is disappointing because the Scala 500 did not have these issues.  My headset also split along the plastic seem and had to be glued back together - the scala 500 I had went through a washer and dryer and still worked!  I just think the 700 is actually a step backwards from the 500 and therefore cannot recommend it.