These cutting boards are the best that I've ever owned. With single-slab maple cutting surface on each side, they are kind to my sharp knives, and they have some kind of laminate polymer layer in the middle, which has held up for almost three years now, through hundreds of dishwasher cycles and aggressive hand washings.
I have a couple of them in each size. At less than a centimeter thick, having a bunch of them doesn't take up much more space than having just one.
UPDATE FROM THE FUTURE:
3,294 days later, these same cutting boards are still in daily use and have survived thousands of cleansings in the dishwasher.
Only one has been destroyed (delaminated after being inadvertently left submerged in water for over a week).