I've had the Snooper Sapphire for over a year and, if I'm honest, I've very rarely used it. I'm not a speeding driver and always tend to drive carefully, but these devices are designed to give you piece of mind - something which the Sapphire has failed to do. The accuracy of the database is questionable, due to the fact that not all speed camera locations (including fixed cameras) are recognised.
As said above, I tend not to use the Sapphire anymore. There's arguably little difference between the Sapphire (and other similar devices) compared with the speed camera databases compatible with general satellite navigation systems. If I were to purchase another device I'd opt for one with radar detection technology to supplement the database.