I haven't used any others, so I can't compare it to, say, a Shimano hub. I have a home-built headlight with a 4W LED bulb and a cheap LED taillight. It's an MR16 tracklighting bulb. It's extremely bright, I've done a night brevet with it and it was as bright or brighter than the guys running Dinotte's and such. No noticeable drag when you're actually riding it.

Here's the headlight I use (it works on AC, so it doesn't even need a rectifier):
http://www.dealextreme.com/p/mr16-4w...hite-12v-30208