MMX is a great addition for cleaning up the cockpit. I'm one of those "less is more" kind of guys and with this addition it cleans up the bike nice. I love that I no longer have to adjust two bar clamps with this and am less likely to break parts. If you don't have this you NEED it!
If running just a Sram shifter, the discrete clamp will do the job, but you are running Guide brakes with a Sram shifter, go with the MXX version which will put both shifter and brake on the same clamp.
I originally bought this for my new Pivot Mach 6 but found out during the building process that it was not needed. My SRAM X01 Shifter and Rock Shox Reverb Trigger attach easily to the Guide RSC Brake Levers for a super clean handlebar like Brett said below.
Feel free to contact me directly with any questions about setting up your bars. Kyle L. - Expert Gearhead - firstname.lastname@example.org - 801-736-4337