I don't have the bass but I have the Marquee/Marvin-based Double Six. I played an original of these back in the 60s and for me, this is a much better guitar. The original had a bar bridge, the new one has 12 intonatable saddles... The frets & finish, in general are impeccable.
The body on these & I think the bass & the guitar share the same one, is pretty big - just about as big as a J Bass although being Agathis or whatever, isn't overly heavy:
Personally, I'd fancy a 32" Marquee & put it through my MXR-80+, but that's just me!!
G.