(Warning: I've been playing MarkBass amps for maybe 20 years now, so yup, I guess I'm a fanboy.)
I bought a MicroMark 1x8 combo maybe 10-15 years ago (still made in Italy), thinking it would be used only as a practice amp. I played upright at the time (as well as electric), but I used it to gig at a small room that it was perfect for. That band was ukulele, electric guitar, drummer with brushes, and my upright bass, on a very resonant wooden stage that boosted its output immensely.
I was as surprised as anyone when I ended up using it for 2/3rds of my gigs (mostly small semi-acoustic things), but that's what ended up happening.
It's no good on its own with a drummer, but for acoustic duos in small rooms, it slays. As others have said, putting it in a corner or on a resonant stage really increases the amount of volume you can get out of it. I also discovered a little while ago (couple years ago), that running my Sadowsky bass preamp/DI into the Micromark boosted the pre-amp/post-amp volume just enough to match a reasonably quiet drummer (brushes, bamboo sticks, etc.) on both upright and electric bass.
I think they're just wonderful amps. The Italian one is still going strong, after a lot of years and hours played. (I did buy another one, just to have a backup to my 15 year-old one.)
My main amp nowadays is one of the newer MiniMark 2x8 combos (which now have a full four-band EQ section instead of just the scoop adjustment). I played that amp by itself with the loudest band I've ever sat in with (multiple dual 4x12 cab with tube heads). It was on the edge of its volume capabilities, but it kept up. It's been a great amp for a lot of medium sized rooms with regular rock band volumes.
I ended up selling a CMD-121P because the MiniMark combo was plenty loud enough for what I play now. A colleague once described the CMD-121P perfectly: "The only time I need something else is just for show. It has plenty of power for anything, but it doesn't have the visual impact of a half or full stack." (That has been my experience as well.)