Definitely keepers. Very smooth, and prominent response that just sings in the mix (both my basses were dual EMG MMCS 18v equipped - 4 stringers).
I'm definitely a rock oriented player (usually fingers and nickel strings for me). I'm not a 5 string player, or a slapper, so I can't comment on that. Although I can't see why it wouldn't perform just as well.
Small room last night, but it seemed to fill every inch with notes that jumped right out and were "even" with each other. This seemed to help with stage volume as well. The cab projected so well, I could keep the volume down since I was actually being heard out there. This was not a PA supported gig.
Twiddling the knobs and experimenting on my amp was actually a joy (something I rarely do) as it made my Shuttle 9.2 seem more intuitive.
There is only one handle - something I'm usually not a fan of - especially placed on the side rather than the top. But after spending the night with it, I see why it was done that way, and I have no issue with it. Very easy schlep. I guess if it bothered some, they could easily spend a few bucks and add a second handle on the left side.