I stuck an alfine on my roadrat a few months back. Was running a 1×9 (11-27) beforehand so the restricted gear range doesn’t really bother me. Would really have liked the extra flexibility of the 11 speed version but the price was a little off putting.
Looking forward to seeing how it copes with winter commuting as I tend to chuck the bike in the shed and forget about it, which was the main reason I went for it rather than just replacing the drivetrain I salted to death last winter. It’s already much less hassle to look after than derailleurs. (Belt drive would have be ace but the frame wouldn’t allow it, unless I got the hacksaw out)
There’s a tiny bit of drag in a few of the gears and the shifting takes a bit of getting used too as you have to ease off the power a little.
Being able to shift while stationary is really useful around town and I imagine it would be great on an mtb too. Takes a bit of getting used to the shifter paddles being the ‘wrong’ way round and I miss the multi release that some other shimano shifters have a wee bit.
on-one and rosebikes had good deals when I was looking. I went for this shimano stock wheel from on-one and added on a shifter (which came with cable included) and an 18t sprocket.
Fitting is pretty straightforward, just make sure you get the correct non turn washers for your frame and that you have lots zen calm in reserve for fitting the springy lockring for the sprocket.