I knew of Valentine Reasearch and their reputation back in the mid-eighties when they had boxes to convert grey market cars to help EPA compliance. When I heard they were offering a radar detector I knew it would be good and ordered one. It has never failed me and I paid to have it updated with laser and new internals to keep up with the 'BEAR' technology! I still consider it the best on the market. If you decide on another brand...stay away from cordless as they don't have constant range. It gets shorter with battery age and doesn't tell you until you're 'caught' or have to replace the batteries. Your choice!!