Product review (1 stars): Works great and fairly simple to replace --- (No No No quality is bad)
This replacement shelf is a little different from my cracked LG shelf.  But, the functionality / compatibility is preserved.  Works great and fairly simple to replace.  Just make sure you took the metal bar from old broken shelf and inserted in your new shelf.  It should take less than 20 minutes.
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<<updated 2/1/18:  bought/replaced one in summer 2017, reviewed it (see above) with 5 stars.  However, the shelf broke again in 6 months.  The way it cracks indicates that the part quality is questionable.  But, I still give it a second chance.  Bought another one in Jan 2018.  It is already cracked after 4 weeks of use.  Quality is bad.