Well hot damn when did these come out? I'm a big EJ fan but I've never heard of these!
Personally I've gotten my best EJ imitation with a Strat, a Fulltone '69 pedal that was completely dimed out, a 1987X Plexi RI, a Greenback cab, and a Line 6 DL4 in the effects loop.
As far as how good EJ is... I have this Stratocaster Chronicles book and Jeff Beck said something like, "Bloody amazing; time for me to take up something else!" in regards to hearing Eric play LOL! I think JB and EJ are just so different as players that you can't really compare them to each other... there's enough room for both of them on my plate.
His Hot Licks videos... i got those well over 4 years ago and I'm STILL learning stuff off them! He's one of those guys who, if you learn his stuff, not only teaches out a lot about how he composes but also inspires you to branch out with your playing as well. I like how he uses a lot of interensting chords and such in his playing... very fusion-like.