Did you guys see the Ultimate MFX Super Series cd's? That same guy at Digitech Comm made released those Cd's of patches and amp models on Sep 1st. I was watching some posters there. When I heard their reviews I ordered. I am convinced !! Happy! Elated !! This disc is amazing and makes my GNX4 rock. I just ebayed my POD XTL cause it will now never compare to the GNX4. One of my friends has a GNX3 and he is ordering a disc today. There's a ton, I mean ton of amp models, patches, artist patches. It took him 6 months to make this but I can truly say he worked his can off on these. The sound is amazing and hats off to this Digitech Comm guy for doing this!! Nobody with a GT, POD, will ever compete with these tones!!