Product review (5 stars): Sometimes only OEM will get the job done
I had previously purchased a knock-off of the OEM panels, what a mistake.  I ended up with water all over my basement floor and could not use my humidifier until I could get another panel, OEM this time.  I don't like paying extra for OEM generally, but sometimes it is more than worth the extra money.  My only complaint is that one of the panels came a little crushed on one corner, as there was no padding in the shipping material, but it worked, so I won't ding them for that.