We purchased a GW w/ CSC Viper Kit. This trike is my wife's, after her riding 2 wheel HD's for years she decided it was time for 3 wheels. I've ridden GW for 30 years and I insisted she get a GW because of the power & how dependable they are. We ride with 2 ladies that ride HD trikes, 1 with CSC and the other with Motor Trike. She test rode all the different conversions and it came down to CSC or Roadsmith, based on the quality of the ride. Between these 2 the determining factor was the better brakes on the CSC. Everyone is different, ride them all. LOL