These are far thicker than the usual lot at 0.75" thick. Most of the inexpensive ones you find are only 0.25"-0.33" thick.
They're also quite large at 20" x 14". That's great for spanning over a sink or between two stove burners, which is handy when your counters are in use with other things.
I have a decent bamboo cutting board, but I'm thinking about getting one of these too.