I have the alfine on my salsa Fargo. It has powered my luxos u and top light line plus brake light for 12000 miles so far. I always either have the lights on or I'm charging a battery, so it's always working and still works great. It does feel a little rough now, bearings I guess,but it's only perceptible with the wheel off the bike in your hand. With the rough off-road heavy loaded touring I've put this thing through, I'm more than pleased with its durability. I think it's an excellent value and I'm replacing it with a deore xt trekking Dynamo.