Product review (4 stars): Almost just right, if pricey
I generally rate products solely on how well they function, not on price. On that basis, this merits a solid 4.

As others have noted, the piece that connects to the blower motor fits perfectly, as does the elbow that attaches to it.  I did not have the problems others had with sharp edges or other problems with installation; it went in quickly and easily for me.  As others have also pointed out, the piece that directs the output to the side of the dryer is awfully short, which you can deal with if you attach the next piece of hose to it before you attach it inside the dryer to the elbow.  Instead of doing that, I cut and used a longer piece of duct instead of the included piece, so that I have 2-3 inches of duct outside the dryer if I want to make changes to the connection later much more easily.

As other reviewers have also said, the price for this item is pretty ridiculous, since it's just a couple of pieces of metal with a spot-welded bracket attached. But that spot-welded bracket is sturdy, and it's in exactly the right place. Just take on its own merits, it's exactly the right part for the job. I felt much safer using an LG-approved part on the already very expensive dryer I was installing, so even though the price is excessive, I'm glad I went with this manufacturer-supplied product.

Objectively, it's far more expensive than makes sense, and it would be a decent deal at one quarter the price. Ignoring price, it would merit 5 stars if the duct piece that goes outside the dryer were an inch or two longer.