VERY impressed with this pedal. The tweaks to the original Blues Breaker circuit are just right, nothing that wasn't needed. Slightly more gain, a good bit more available volume (the original Marshall BB couldn't reach unity unless your gain was above noon!!), and a toggle to cut the high end if needed. Very nice.
Zero issues with this build. The layout is easy, parts count is pretty low. Highly recommended if you're looking a great low-medium gain OD without the midrange coloration you get with a Tube Screamer or Klon. Love this circuit.
You Tube Demo here (pre-boxing and very short.... controls were Tone at noon, Volume at 10 O'Clock, Gain at 2 O'Clock, Hi / Lo toggle set to Lo (High cut)):
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