I haven't used one but the only thing that is not in their favor is how they released them with big horsepower gains. I think their advantage over the original boxes comes down to better electronics and a faster switching transistor.

FBO has their HRR688 Daytona Sensors board mounted inside a machined aluminum case and he claims no spark retard until 7000rpm. Again I think better electronics and a faster transistor. FBO is selling box, coil and some wiring for $189.99, shipping included. His box also has an easily settable rev limiter and a light to tell you system is OK.

Frankly I don't think you could go wrong with either, or even with my $40.00 used MSD6. There's been so much hype around ignition systems, wires, coils, boxes, even rotors, that one can hardly believe any one system is better than another, except in real high compression motors or real high rpm motors.

R.