I'll second Jesse's vote. I was unsure about them until I saw them in person at C3. Seeing a bunch of people flailing about with them, the intensity of the light and the durability sealed my desire to get them. The duel staged during C3 was awesome and those guys were really smacking the sabers around and they stood up pretty well. I don't think I'd hit them that hard though, they'd eventually snap.
I've managed to pick up four thus far, one of each colour. Compared to what I can pick them up for now though, I overpaid for both Vader and Mace. Luke was a good deal and Anakin was dirt cheap. I'm hoping to get a couple of Maul sabers, but that should round out what I want.
$240 for three is an awesome deal, I paid that much for the two cheaper ones I picked up after shipping.