Product review (5 stars): Make sure the seller is Amazon
When you buy this item, make sure you are buying directly from Amazon and not another seller.  The filter actually sold by Amazon is the genuine Frigidaire filter and comes in it's proper box.  The other sellers are selling knock off filters that may or may not work.

If it says it's being sold by someone other than Amazon, look under the More Buying Choices and select the one from Amazon.com.  Amazon will usually choose the cheapest seller for you by default, but in this case, that is NOT what you want.  The bad reviews on this item are from people who ended up with knock off filters from non-Amazon sellers.