I saw these a couple months ago. After our last trip with trying to get wood planks under the one side to get the TT level I searched and found these easy to use trailer levelers. I contacted Anderson...
I have a set these also and they are great! Haven't had an issue yet of getting the TT level the first time, every time. The OP is right, it is so quick that you feel as though you forgot to do something. I still carry small pieces of 2x8 just in case but we haven't had to use them yet.