I love this stuff, and have been using it off and on for years. When I am in a facial cleanser rut, I always come back to Purity. It leaves my face feeling clean and washes off makeup, definitely a plus! I also love that it does not sting my eyes or have a bad smell or taste (because sometimes some gets left behind around the lips).
The bottle I received in my Birchbox was decent size. It's been on several trips and just a little goes a long way. It's great for travel and everyday use.