Brembo RCS Review?

In the most recent Sportrider, there was an article on an upgraded ZX10R.  One thing I was very interested in but wasn't discussed in detail was the Brembo RCS Master cylinder.  Overall, how much better than stock is it?  How much difference is there between the 18 and 20 leverage ratios?  Did the RCS come with a brake micro-switch or was it a separate purchase?  Is it a worthwhile upgrade (for use on both street and track-days)?

Thanks.