Congrats! I've had GAS for the dual-band and dual-engine FEA comps, but after your review I suspect they'll have company.
This thing is amazing! I can't believe how quiet it is. The three band EQ is so cool. I can make the D and G strings sound fuller and yet not over compress the E and A strings. Also, no matter how much squish I add it never gets muddy. I don't know how that's possible, but Frank pulled it off. I now understand why FEA Labs (and Origin Effects) are the gold standard of compression pedals.
Love my opti-fet. It's my favorite of the FEA comps. The side chain EQ is super useful. I roll back the bass ever so slightly.