I've used both etude house sheet masks and, more often, innisfree sheet masks. I stuck with innisfree masks for a long time because I thought the ingredients would be better.

I got a sample one of these masks as a freebie with a Jolse order and thought I'd buy this pack while it was on sale as it was a good deal. I really like these masks. The size of them fits my face better then others. Also, the sheet itself isn't rough or thick, so it isn't uncomfortable on the skin. There's also a lot of essence in the pack so you're getting a great amount of hydration from these.