I'm an education consultant for Bainbrdige so I got to see these boards awhile back. They are made a little different in that they aren't two 4 plys put together, they are a solid board that is about equivalent to a 7 ply. I designed a couple of pieces with them for Atlanta and they cut really well. You put the blade out just far enough to go through, but because of the way they're made, you don't have to score and then cut through. One cut does it and no hooks. (The guy told me they would cut really well, but I admit I was skeptical, oh sure, I said, but they do.) I really like them a lot. They give the deep look but not the trouble cutting. I used a very sharp blade.
They are made for preservation framing and have Artcare. Mostly neutral colors right now and they all come 40 x 60.
Remember I am a consultant for Bainbridge so don't misunderstand this post, however, I'm also a framer, have tried them and wanted to answer your questions.
Nona Powers, CPF, GCF