After our old cutting board got too scruffy, we replaced it with a set of Casabella Silicone Cutting Boards. The four thin, curvy boards are color-coded to reduce the chances of cross-contamination. The back side is silicone-coated to make them non-skid.
They’re clear plastic except the borders, which are red for meat, yellow for chicken, blue for fish and green for vegetables. They’re 16” long and about 12” at their widest. For the clueless, each board has a cartoon showing what's supposed to be cut on it. Each also says "this side up" at one end and Casabella at the other. There are holes at the top so they can be stored on a hook.
The boards aren’t dishwasher-safe: they’re supposed to be hand-washed with mild soap and warm water; and don’t use bleach, harsh soaps, or abrasives.
Our 15-dollar set is several years old. They’re hand-washed with other dishes and knives that doesn't go in the dishwasher. All of them have lots of scratches and knife marks. They’re all cut on their backs, since the "this side up" message is hard to see on dark countertops. Upside-down vs. right-side doesn’t make much difference, since they aren’t very non-skid , especially when there isn’t much weight on them.
Our Casabella boards have remained flat all this time, a definite improvement over our old boards that started curling almost immediately. Compared to wooden cutting boards, they’re flimsy and light-weight. I use them mainly for cutting raw meat, and cut most fruits and vegetables on a wooden board.
I find the set of four to be overkill: I’d rather use a single plastic cutting board for animal products and use a wooden board for plant stuff. I don't mind that they aren’t dishwasher-safe, though some people do. I definitely think the "this side up" sign should be easier to read. Overall, I find the Casabella Silicone Cutting Board Set useful, but I don’t think they’re anything special.