I've only used one so far. Will update when I've used it for a few weeks.

Pros:

The mask does not have a strong smell. I got a pleasant cool sensation that I found really relaxing after a long day of work.

It stays on your face while you move around, so no need to lie down.

It makes your skin look better overall, right after and into the following day: more even toned, pores somewhat shrunk.

Cons:

Not great fit on my face.

Not tons of essence left in the pack, but it does stay moist for quite a while on my face.

Effects are not dramatic (but still, they are noticeable!).

Overall, I think I will repurchase. I've had masks do far less for the same price!