I think they've only hit retailers within the past 30-60 days so I doubt if many people have had a chance to try them, including myself. I can say that I have never looked through a dual-power set of binoculars and liked them, including the ultra high-end stuff. I think your skepticism regarding sharpness and clarity, particularly at the 17X level are absolutely correct. Another issue...given they apparently weigh 24 oz. I think you would have a nearly impossible time holding steady and having a pleasing image while using 17X.
As a comparison, in my opinion, the Leica Duovids in 12X do not provide the same quality image as a 12x Ultravid.
I would also like to hear from someone who has actually tried this particular pair.