I got one in the dry cleaners. Quiet basic, more suitable for removing white 'fuzz' off dark clothing. Not much good on the fluff balls. I find that manual removal is the only way to go. Boring, but oddly very relaxing!,
I got a defuzzer thing (can't remember the technical name) in H & M; however for a diy method try wrapping sellotape around two fingers and then attacking the jumper, it works. As ophelia said, its very relaxing!