I,ve recently bought a Snooper S6400 and so far it seems pretty good. I've mounted mine as close to my left hand as i reasonably can, as the touch screen needs quite a frim touch. The auto-scale feature is quite good in some ways, giving a large scale view of roundabouts etc. but it's a bit difficult to reduce the scale to see a larger area of the surrounding countryside.
You can download sample pages of the instruction book from the snooper website to give you a feel for the controls and features; the full instruction book comes on CD and I've opted to print off the UK part 9i.e. in English) - all 84 pages of it. It does take a bit of reading.
The kit comes with an unidentified 'thingy' with a USB connection lead on one end and two leads on bearing a fuse carrier on the other. This is for connecting the device permanently to the car 12v supply and is presumably a filter/surge supressor as the book warns you not to have the cigalr lighter plug-in power supply in place when starting the engine due to possible surge damage.
The voice commands are good but the quality is somewhat tinny (but I'm comparing it to the previous car with a built-in system playing through the car radio/music system.
it takes a little time to set up for a trip as you have to go through a start up and choice (car, car+caravan) stage each time.
The display does not seem to have automatic day/night illumination but perhaps it's there and I just haven't got that far into the book. Speed camera alrets are on a separate data base which has to be downloaded for a fee. The standard screen does, however, display the speed limit applying to the road you are currently on.
I have tested the choice of route to a known destination using car and then again using car+caravan and it showed two different routes - those I would have chosen from experience, so that's encouraging.
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