Summary - I don't think anyone is going to be disappointed with the SP1.
The setup was decent but a little 'on the edge' for me, I felt it benefited from lowering the pickups and raising the action a bit (truss relief) to let the strings ring a bit more.
Soundwise the P pickup is sublime, fat and with clarity, also the J is definitely not thin (it's actually a 6 string sized pickup from Combustion model). Blended in parallel they give an excellent balanced tone where neither pickup is overpowering, and in series it takes on a totally new character - but without overwhelming the output (which is an issue i've had on ALL Combustion based models).
It has the Fender vibe to the looks and tone, but with Dingwall zest, it could easily be a 'one to rule them all' instrument. However as I practice bass polyamory, that won't happen with me.
n.b. now features block inlays (Neck Illusions) and Canadian knobs