I do not own one, but have tried/felt one (may have been a different brand but same length). It just doesn't feel right for me. I am so used to bringing a long gun right up and not have to lean in to it. YMMV though. Maybe it would fit me better if it had a pistol grip. It does look good! I have been thinking about trading off my 390ST for a HD setup. Just can't bring myself to letting it go.
BTW, try to say "Houge short shot stock" three times fast.