This Might Be A Long Review
To clarify, I've only used this mask once.
Upon inspection, you have a clear tab that helps you open the package easily, and inside, there is a lot of milky-looking serum that smells great (like a fun, fragancy kind of strawberry. Also, if you want to, take a few cotton pads and stick them into the package, clip it shut, and use those pads later to put on your face you think need brightening. There's that much leftover!). My skin didn't react harshly, thank goodness, and I left the mask on between 15-20 mins (honestly, whatever floats your boat between 10-20 mins of wearing them-it's up to you). Of course, my skin let the serum sit there for awhile (another point I should make is that my skin is more oily than not), so that's not going against the mask. While I was reading reviews of the mask before buying, some people were describing this mask brand to be weaker compared to other companies, and that you'd have to constantly keep using them to get a noticeable result. Can I agree with them? Not right now. I'd have to use this mask at least two more times before coming to any sort of conclusion. But, if they happen to be right, I'd think that would be good for someone new to face masking that wants to see how their skin reacts to different ingredients, and save a buck or two.
All in all, these masks are cheap, worth what they pay for, and look fun and feel fun for a girl's night or a little refresher in the tub.