I sent in my Pro to Whistler a few weeks back for a check-up. My warranty was just about up so I decided to take advantage of the nice two year warranty and have it looked at. Whistler said everything "checked good" and "Tested fully functional". I was pleased how Whistler paid for return shipping. I love the two year warranty on the Pro Series. I did not ckeck if Whistler kept this for the Pro 78. I almost purchased the 78 at $142.99(I think). Probably will soon. Oh, I called escort because I was bored and asked if I could buy an original 8500. He asked why I would want the original and not the X50. I just told him I do not need the Pop technology. He said no.