in year 4 with the alfine 8 on my cross check commuter bike. I think it's a perfect solution for this bike. As a year round commute solution it's done everything I'd hoped it would do. I whole heartedly recommend them for this use.

Maintenance - I've had to readjust to cable due to stretch a few times and I had it overhauled last year for preventative sake. That's it. Chain stretch is not an issue as I have horizontal drop outs. Changing flats is not an issue at all with a little practice.

Con's - They're heavy.
Gaps between gears are a compromise if you are used to 20 or 30 combinations. But overall range is good. I feels like you lose something in the power transfer from the pedal to the road, Not sure why that is but it is.