I purchased the Whistler Pro-78SE Radar Detector from Amazon over 4 years ago and I couldn't be happier. The device has worked flawlessly since purchase, however, there are some caveats. There are many options for this radar detector, but perhaps too many. Every time my device accidentally gets reset, it takes me about 10-15 minutes to reconfigure to my liking. Since purchasing the radar detector, the price has gone down significantly, but I would still recommend it to just about anyone looking to invest in a reasonable tool for the road!