It's a 2 in 1 product and can be used either as a wash or mask. I've been using it daily as a wash with my No7 Cleansing brush (review here) and, unlike most products advertised as a 'wash', doesn't create much foam or lather. It's very thick and creamy to apply and leaves my skin feeling moisturised and clean. I've used it once or twice as a mask, but it didn't impress me at all and my skin didn't feel any different than it does when I use it as a wash.
In the month or so that I've been using this daily, I can't say I've noticed any changes in my skin or the amount of blemishes I get. I do enjoy using it, and I especially love the menthol scent and the way the menthol leaves my face feeling really fresh, but it's not a ground-breaking product and I probably wouldn't buy it again unless I was once again stuck with the small selection of skincare a small supermarket has to offer!