I won't play with them and always trade them of they're valuable. The only time I ever play with them is in limited, and I hate it.
I live in a dry environment and they curl an insane amount in less than 5 minutes. They curl through sleeves, and even double sleeves. You can uncurl them in a tupperware with a wet sponge for a few days, but they will not stay flat so what's the point.