I enjoyed the transition from gears to ss a few years back.
It helped me learn/try to use the terrain, think about line choices (stop sniggering in the back, for those who know me).
I found a level of commitment and determination was needed to climb steep trails, thus making a climb in some ways easier and faster, however it can be anti social, as you leave others happily spinning up behind you, only to find you recovered and raring to go...
Descending, it's kinda good for interval training as you spin like a fool (which usually results in much giggling), then work the trail to maintain the momentum, however it can be frustrating when you want to go faster but the incline and leg speed won't allow it.
Also i know plenty of ss'rs who happily get off and push up the hills, time to have a chat to other like minded pushbikers ;).
If you're to sort of rider that hates getting off, even if it means riding at less than walking place, then ss is perhaps not for you,
For the area i did it most, the Quantock, dartmoor, exmoor and Afan it was fine.
Not for everyone, but just an alternative way to get out and ride.
