Which brand are generally regarded as offering decent ones? I've had a look at some of the snooper detectors; more specifically the S6, and they seem to be had for quite reasonable brices "brand new" on ebay. I'm a little confused about the subscription service though, which is used to update the database of fixed camera locations. From what I've read you can pay per month or over a longer fixed period, but is it really necessary to update every month (maybe it is)? Can't you just pay when you want to update the directory, or is this not possible? Lastly does the S6 model have a cumbersome power lead which plugs into the cigarette lighter or can it run off battery. If possible I prefer not to have power leads running everywhere. Cheers.