No, I can't say I have I'm afraid. All reports I've heard have been excellent, and Stevepage's clips sounded very good, especially considering he was boosting his POD.
I'm definitely going to be putting in orders for one of two of his pedals in the near future.
While a lot of people answering this thread are suggesting great pedals, I'm not sure that they are quite grasping the way you will be using your OD. You are looking to use the OD simply as a tone-shaping tool - setting the drive to 0 or just above, and letting the inherent bass-cut built into the pedal tighten the low end, while using the tubescreamer's midrange to thicken the sound, add focus and punch.
This is exactly the usage that Joe has designed his pedals for, and that is the reason I'd recommend his stuff.