Solid linings... I bend them along with the bindings so they're no more trouble than kerfed linings. I use Spanish cedar because it smells nice.

Solid laminated, usually 3 at 5/16"x1/16" and 2 at 3/16"x1/16", bent on the bender right after the sides along with the binding.
I've used oak and poplar, and I'll probably try basswood. I like oak because it bends easily and is readily available, and I think the extra mass on the edges of the plates might be a good thing. I'm not at all sure about that, trying the basswood should give me some insight.

James do you use more than one per side and 'stack' them? What I love about the solid linings is that the rim is very stiff outside the mold and will hold its shape very well.

Like most everything else its a matter of opinion but I like the idea of basswood because it is so acoustically dead. It seems to me that it would keep some vibration on the top rather than taking it to and through the sides.

Robert: Thanks for posting pics. I get the first one but not the second. Wonder if you could fill us in. Alex: I use reverse kerf lining generally Mahogany because I find I can do a much better job of inletting braces without blowouts and that results in a neater finished look.
Tom