YES!! It's very very helpful, although the only problem is that the supermarket I do my shopping at has rubbish signal, it goes as soon as you take about 12 steps inside! I must look a right pleb as I find something, then run outside to check the syn value, then run back in again, then I find something else, and run back out again!! The security gaurd looks at me very strangely and I'm sure it's only a matter of time until he pulls me to one side and asks what on earth I'm playing at!!!!!!