Update (finally)....
The eggies arrived during the week and we played with them yesterday.
The directions say fill a pot 2/3 full of water (or deep enough for the "eggies" to float), coat the inside of the "eggies" with cooking spray (we used butter), filled one with Egg Beaters and one with a whole egg, put into not-yet-boiling water, started timing after boiling started.
Well...we must have filled the one with Egg Beaters a little too full and it leaked slightly but not badly. Created the egg foamy thing in the water.
Then about 1/2 way thru the cooking we heard a muffled underwater "poof"...and noticed a little more egg beater liquid pushed out of it.
So maybe we didn't screw it shut tight enough either.
We didn't notice anything with the real egg.
The cooking chart says "if you're boiling only egg whites they'll be done in 2 -3 mins". And since Egg Beaters is made from egg whites, coloring, and powdered milk, we cooked them according to the "egg whites only".
But when we opened it, it wasn't totally cooked. Next time we'll know to cook it longer.
The real egg DID cook but it stuck a little to the insides of the plastic. Next time I'll use the cooking spray instead of butter.
I didn't notice any plastic taste to it either.
So I say thumbs up despite user error.