I did a test with the MRP4064 CW decoder and at the same time CWSkimmer. I think they are quite the same. Sometimes MRP is accurate another time CWskimmer. The pros for Cwskimmer is the multi decoding of more than 1 station. When I transmit with MRP and the other station changed the transmit frequency the station is out of my range for decoding. I do not have this with CWskimmer. Only you have to pay 75 bucks for CWskimmer, and 50 bucks for MRP. That is a whole lot of money. Learning CW is for free but it takes some effort to learn. And yes, I did work 3V8BB (Tunisia) on 10 meter today.