I was kind of surprised to see any bad reviews on this mask. There is a little bit of a fishy smell to it, likely from the pearl water, but I didn't find it to be insanely bad; I thought it was sort of funny because my cats come and sniff my face when I have this on. I would say just be extra careful to remove all the mask including anything that may get trapped around your hairline. It just will get on your towels when drying your face off, if you aren't diligent to remove it all, and I'm not always as diligent :). I've had acne and oily skin most of my life; so, I really work hard to keep my skin clear and healthy. I have used a ton of different skincare products like Eminence Organics, Botnia, etc. and this is one of my favorite masks that I have ever used. I don't use the apple cider vinegar; I was careful to try it without and added some for one application but didn't particularly like it; so, I just use the mask with water twice a week, and it's very gentle and nourishing. Apple cider vinegar is going to kick up the intensity; so, people should gradually add some and only do it once a week and see how their skin responds. As a person who has worked very hard to manage my skin my entire life, this product has been amazing. A little intensity of the smell and having to splash some extra water onto my face to make sure I removed all the mask is nothing to me compared to not having clear and healthy skin. I think this product is fantastic, and I would highly recommend it.