I think some folk are getting confused. It's not about having a super silly low gear: it's about having a good spread of usable ratios and simplifying the drive train. The 32/42 ratio is almost identical to a 24/32 on a triple (0.76 vs 0.75 respectively).
Here's the complete setup... 11-42 cassette on the back and a 32 chain ring up front.
There's no big ring as the top few gears are rarely used off road, There's no granny ring - the big sprocket gives pretty much the same low ratio and all without having two juggle two gear shifters: one of which would be getting caked in crap flicked up by the back tyre anyway.
Now I can quickly go from top gear to bottom with three pushes of the lever, and the clutch rear mech and narrow/wide tooth profile on the chain ring does a super job of keeping the chain located without the need for chain devices.
I've had a quick go round the block tonight and all seems ot be working OK. come the weekend I'll get out for a proper ride
