Yes I have one parked on my board now over a year and I love it. Some of the modes pushing a crunched amp aren't useful but most are. I mean it is a no brainer. This circuit is based off the exact circuits in the original pedals that JHS had on hand in his own collection. As close as they could get them given their tolerances and component drift. It is a total bargain for what it is. The JHS and Keeley modes sound unbelievable. The OD-1 and TS-9 are great, 808 is what you'd come to expect. I leave mine parked on the ODR-1 mode though. Love it there.
Have no fear you will hear the differences flipping through the various circuits. I'm never getting rid of this pedal.