The drive fits inside my Shuttle Sn25P XPC fine, but it appears that the DVD tray is a 'little' bit bigger than standard and it clips the top of my concealed drive door. I managed to fix it by cutting the chassis slightly (always an option for a Shuttle owner!) and drive works with whatever I throw at it.
I recommend downloading ANYDVD/HD from Slysoft as this gets around any region protection on Blu-Ray! Yes, you can finally buy those early releases from playusa.com you always wanted.
Overall, a great drive at a great price.....so much cheaper than buying seperated standalone players (I just sold my Toshiba HD-E1 on the strength of this drive!).
Buy one!!!...you won't regret it if you are into HD movies.