For what it's worth MBUK magazine has a disc brake review this month.
the key piece of info there being "MBUK magazine" meaning it's worth sweet FA.
shimano are the king of brakes IMO. my slx's are a piece or piss to bleed. cutting the hoses and re-bleeding was no troube at all – and at that point i was a beginner re. brake bleeding.
5mm fish tank tubing and a pair of syringes.
connect tubing to open valve at the caliper and open the system at both ends. pump the lever till oil stops running through.
fill oil from the bottom till there aren't any bubbles coming through. remove excess oil with other syringe.
i'm sure there is an easier way of doing it but it works for me and i'm more than happy.
the modulation with shimano is second to none in my experience. ridden Formula, Hayes and Magura and niether comes close – even with shimano's basic offerings.
end of.