Wow, that's a low price. What's the catch? Is it heavy or draggy? My Sanyo is said to have the highest drag, but it's not much worse than the others. "The worst" isn't bad, so the comparisons can be misleading. On the other hand, I built a wheel for another BF member with the SP hub. Wow, that's a gorgeous hub, and it's said to be among the most efficient. Next time I buy a dynamo hub -- and I don't know when that will be, -- I'm definitely getting an SP hub. It's also lighter than most of the others.