Oddly enough, though I already knew how to separate when I bought it, (because I always like to get other people's take on the subject) I found a lot of use from it, but after looking it over again, it is more art prep than actual sepping. Again, there are tons of vids on the subject, but there are a lot of not so good ones too; the more you learn, the easier it is to shake out the chaff and get the info you need to work. So, I'll withdraw that suggestion...
Steve