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...
Neat way to level but $80 for two? That's a high price solution to a problem that has plenty of low cost solutions already. I use wooden boards to level from side to side and it certainly isn't hard enough to do for me to throw down $80 for a gadget.
Still, I'll be curious to know how they work out for you.