Well I have not used or seen one but I thought it was interesting so I read what I could about it. I hate to see any serious post here not get any play or discussion. The things I said were from the perspective of how it might do on athletic fields, having forgotten the "Public Grounds &" part of the forum name. Sorry.
Although it seems well suited for where you want to use it, I agree that only someone who has used one can help you. I hope you get your answer here.