Nearly there...

I worked like stink on the banquette today and cut the mdf for the tops ...

 then cut up the single foam mattress to fit ...

then upholstered the boards (and I only dropped the staple gun on my toe once) ...

AND then primed the base with a stain block primer...

AND THEN added cushions, just for the hell of it.  :)

I've got to clean up some of the rough edges on the base before the final coats of paint, but the end is definitely in sight.  I'm so happy with how cozy it makes the dining area look.  :)