Couch Potato Binocular Chair

I read the review of the couch potato binocular chair on cloudynights.com. Anybody out there used one of these? It looks like a great idea -- I'm thinking of getting one. The cloudynights review mentions some possible stability problems. Anybody who has used one of these have an opinion on the biggest binoculars that could be used without stability/vibration problems? Anybody have any ideas on increasing the stability? Any replies will be greatly appreciated. TIA.

Stuart,
I tried one briefly at a star party once. It was actually pretty cool. The chair selected for use is very important in terms of ease of reclining, etc.

Jim

Thanks for the input guys. I definitely plan to get one of these in the near future. My biggest binos right now are 11x56 Oberwerks, which it sounds like should be OK on the CPT.