I've owned Rocky Mountain Radars for years and recently ordered 2 of the RMR-C475. There are some nice improvements to this version with 3 suction cups on the window mount versus the 2 on previous models. This model seems to have better filters to avoid false signals. There is only one time in all the years I've had a Rocky Mountain Radars that I've gotten a ticket and that was because I turned off the volume. They are a great product. I've had no problem with this model so far, but in the past models the speaker has gone out after 2 years. Will have to wait and see if that problem has been addressed on this model.