Product review (4 stars): Works well for my situation
I purchased this product, not exactly for what it was intended, but it still works very well.  My drapes are the length of the register and the air was blowing behind and underneath the drapes.  The register there, didn't help the situation, as it needed to be longer.  So, I purchased this product.  It goes sideways, still, but enough of the air disperses and does not go under the drapes and blow them.  So, for that reason, it did work well.  I gave it a 4* because it is not a very sturdy plastic.  I wish the manufacturer would make one to turn the other way instead of sideways.  I'll buy another one for 2 other rooms that have the same problem.