I tried Carbosticks in 2008, yung Bronze line. I used them for about six months, when they got too thin at the neck for me. I haven't broken them yet though, so I'd say they're a lot tougher than wooden sticks. They said the Bronze lines had more rebound than the Silver lines, but they didn't seem to have nearly as much rebound as wood. Gusto ko pa naman maglaro with rebound. And it also sounds very choked, as opposed to Ahead sticks which sound very sharp (at least, to my ears).
As far as durability goes, it's tougher than wood, but it's not as tough as Ahead. I bought an Ahead pair last December 2008, and I'm still using them today.
For the record, I alternate between Aheads and wooden sticks, depending on the style of the song.