Product review (3 stars): Handle careful as they are easy to damage.
These filters look okay and seem to do the job, but they are cheap, light and flimsy-- for the price, that's probably to be expected in hindsight. I ordered 2 filters and the packaging looked fine. When I opened it up, one filter was crushed and not usable (I got clearance to send it back for a refund). The second filter, and I'm not kidding, came apart as I was opening the plastic bag it was in. The normal plastic bag was stronger than the construction of the filter. I was able to put it back together again, but I was a bit impressed with the relative lack of rigidity of the overall product.

So, why did I still give it 3 stars? Once installed, it's not like these filters are going to see a lot of abuse or wear and tear. They sit there-- so their flimsy construction isn't that big of an issue when you look at the overall picture.