Had a lot of problems with rotor rub, sticky pistons and noise. The Magura SL2 rotors warped easily. The flexy levers made me consider trying something else instead of upgrading them further (40 GBP for a pair of HC levers).
Magura MT5 140£ for the pair
+ Good power
+ Modulation
+ Sleek looks
– Plastic bleed screw, very easy to over-torque
– Plastic bar clamp breaks super easily, broke two already
– Noisy (naturally depends on the pads, definitely true for their performance ones)
– Flexy plastic levers
– Fiddly bleeding, easy to spill oil on caliper
– Minimal rotor to pad clearance
– Sticky pistons (may be a universal problem)
– Not possible to rebuild
TRP Slate 4 80£ for the pair (found a deal)
+ Long motocross like levers
+ Modulation
+ Easy to bleed
+ Cheap as chips
+ Single bolt brake pads (vs two for Magura)
+ Good rotor clearance
+ Metal clamps and bleed screws
+ Best in class pad availability (takes Shimano pads)
+ Better rotor compatibility (takes normal thickness rotors, but you can use up to 2.3 mm ones I believe)
– Lower braking power (not an issue for me, it’s flat here)
– Not the prettiest, not Hope.
Hopefully the TRPs are fairly quit (depends on pad material naturally).