The Mags are a highly engineered German marvel, they have excellent modulation, good power, are lightweight and are gorgeous looking. If bleeding is required the new EBT system is much easier to use.
They can be slightly susceptible to some fade on extremely long, and steep downhills, but larger rotors help alleviate much of that issue. I liked the feel of the brake, but some may find it to firm, and the reach adjustment is difficult. I do wish they had released a full magnesium set!
The newly upgraded Marta is a huge step forward, and the Mag version tweak is another sweet brake from Magura!
-Slightly susceptible to fade
-Reach adjustment difficult
-Not fully magnesium
-No split clamp system
Value Rating: 3.5 Flamin’ Chili Peppers
Overall Rating: 4.5 Flamin’ Chili Peppers
Marta SL Magnesium url: http://www.magura.com/en/products/disc-brakes-2009/prod/marta-sl-magnesium-1.html