Pud, I purchased the Vertex pro a couple of years ago from Ian, very happy with the unit, it does require some reading of the manual to get your head around the controls etc, but performs all functions extremely well. I use it as a back up to the A/C radio. Was at the aero club the other day with the vertex turned on and monitoring an inbound aircraft, it was commented by another that they would not usually pick up an aircraft 10 miles out, with such clarity, with their handheld(Icom). Hope this helps.