I played in touring duos and trios that used a stompbox instead of a drummer. The best thing I ever heard was the Bigfoot by Wolftone. (now called Wild Dog following some lengthy legal issues)

My point is that (most) every other stompbox I heard, sounded real "clicky" with no real THUMP like you'd expect from a bass drum. The Bigfoot could sound huge and the guitar player ran it through a 10 band EQ into a 15" sub. We played pubs, theatres and festivals all around Australia and it always sounded great.
A lot of the DIY and old school stompboxes I saw were inconsistent in their performance, could be prone to feedback and as I said before, lacked big bottom.

I have no idea what the electronics were because the builder (from Byron Bay) would not tell anyone what the secret sauce was and drilled out all the screw heads after he assembled them.

I've heard the "Puck" ones and they still fell short of the Wolftone/Wild Dog brand.