Being first doesn't make you the best. That is silly to even imply. That said I can only speak from personal trials. I have both a Gracoil w/LOP adjustment and Rad IIa w/LOP adjustment. I prefer the Rad IIa. However, they both work as advertised. The Rad IIa is just a better system in my opinion in both function and adjustability. It also seems to be built better. I can't comment on the Bump Buster as I have not tried one.