I like them. On a basic level, I think I really like a tiny eurorack mixer VS and traditional tiny mixer.
It’s very convenient to have everything working with mini jacks. Mainly though, being able to patch into it for panning, FX send amounts, channels volumes, definitely adds a lot of functionality that can have a significant and noticeable effect in the music. In that track, so much of the final ‘feel’ comes from CV control of the mixer pots – control over the stereo image is very nice in my mono setup. I like that.
As far as what it’s like VS other eurorack mixers, I don’t know. The price is high, and I think at one point I did notice some channel bleed, but its hard for me to notice if that was/is a problem because of the type of music I make (not too many quiet spots). I like that its expandable, although I think I will keep it as is. I also very much like the ascetics (something I am a sucker for).
I like to have it out of my main case and its own small one, although getting those modules and all the cables in there was quite an ‘experience’. 
I’m not an audio professional by any means though. 