Maguro - I have fished off of boats that have those on them. The boat was a 23 mako cc that had one mounted in the bow back when we were fishing for giant tuna. They work, but its much easier fishing out of a swivel rod holder than one of those things. They are much different than a fighting chair, and its mostly all using your arms (versus in the chair you use your legs / back). Curious as to what are you thinking of using that for? A good stand up belt and harness might be a good option.