I bought a set about 6 months ago and have used them several times. Previous posters are correct; you do need to spray the inside with a no-stick spray before you crack the egg into them. That tends to give the exterior of the hard-boiled egg a rather "dimpled" appearance (think golf ball). They don't make the most attractive deviled eggs, but I use them mainly for making potato salad.
I like not having to use a ton of water trying to cool the eggs rapidly so they peel easier. They work for me!
2013 Eagle 266RKS
2011 Ford F-150 w/3.5L Ecoboost & H.D. Tow Package