I used to have one and I absolutely loved it. I have regretted selling it for over a year now and I am actually considering building up another one. The bike was pretty stiff and a little heavy but it instilled a level of confidence in me that has been unmatched. I had more confidence on that bike than any dually that I have owned.
I sold the chameleon frame to get an S-works hardtail frame. That was a big mistake on my part. I never did really enjoy riding the S-works.