No one uses or has used one ?
I would have thought that there would be a few experimental types here at IIS that would have played with one
The only link to anyone on IIS looking at one was Hagar back in 2008.
I see a height adjustable pier as being quite useful depending on if you are observing with a school group or a group of adults. Not having to worry about people tripping over or falling off small steps/ladders is also a plus.
cheers