Tom the settings that you can adjust with the castle link are endless. Besides the braking and throttle curves, punch control, drag brake, start power, motor timing, motor type, arming type, low voltage cutoff, throttle dead band, and some other features. You can also change things like forward reverse, forward to brake to reverse, the possibilities go on and on into space. I think if the Mamba Max was $200, and the Castle Link was $100, and a comparable Novak (which there isn't but just for the speaking point we'll say there is) was $50, I think the mamba max would definitely be worth it. The mamba max comes with the USB cable and you don't need the Castle Link programmar like on the sidewinder, but I think it's definitely a good deal to go along with the sidewinder. They've been selling on the RC forums for around $10 used with shipping. Might check around before buying a new one.