I played a few gigs & sessions with a guitar player that used them and they were okay but when we got to mixing we wound using direct tracks and reamping. Live they were brilliant but under the microscope of the studio not so much. I do wish Mooer would do some bass amps but there are always the One Control Blue 360 and several others in that footprint that are excellent. Fwiw modeling has really advanced in the 3 years since those were released.
It's really frustrating they haven't made a bass pre. They've crammed just about everything else into one of those tiny enclosures.