I've had this for a few months and I've been rehearsing and busking as a bass player with this amp. The size and weight are fantastic, you can operate it with a USB-C power bank which is also great. The amount of bass frequencies you can get out of this little amp is REALLY good.
What I don't like is the character of the 3 band eq and the preamp. The EQ is very mid-heavy and the curve of the knobs feels weird compared to all the amps and preamps that I've used before. Not very musical.
The high band of the EQ is a shelving eq, but the high pass frequency is WAY too high for a bass guitar (the manual says it's 10KHz). My P style bass does not produce frequencies that high at all, so that band of the EQ is pointless. I did try the amp with a Stingray bass which has a 3 band active EQ and if I cranked the highs there, then I would get some control over the high band in the amp's EQ. At some point I even thought the EQ was broken, but I connected a music player and some white noise at the input and the EQ's high band was in fact working. I don't think this is a very useful EQ for a bass guitar.
The pre-amp will not distort AT ALL, no matter how hard you hit it with humbuckers or active pickups, so if you want even a little bit of distortion, you won't get it.
A pre-amp and eq similar to other more "familiar" bass amps like Fenders or Aguilars, where the EQ is quite interactive and the preamp allows you to get a bit (or more) of drive would make this amp a dream. As is, I'll probably add a pre-amp pedal which is inconvenient in some situations.
I'm quite happy with not having to carry 4 extra Kgs to get a decent bass response! :)