I do! And since I did not pay for mine (won it at a Boxster event) I have no vested interest in saying it works just to defend $ I spent on it.
That being said, it lives up to the claims. More pull throughout and yes it's a similar if not the same concept as the IPD plenum T.... but a much lower cost. It will take your ECU ~ 30 miles or so to relearn/re-map based on the increased airflow but once it does, the results are great! Never tracked the potential increased MPGs from it and all I have are my butt-dyno results but I give it 2 thumps up!
Plus, Pedro is a stand up guy and I think pretty much offers a 100% money backed guarantee on this and [almost] all his parts. With customer service and dedication like that you can't go wrong!
Definitely should go for it