I've been using this for years and it's an all-time favorite of mine. I have acne-prone, relatively oily skin, but it's also a little sensitive to skin products sometimes. I've had acne since I was in 5th grade and now, a freshman in college, it's not nearly as bad but I still have it occasionally. I've found that the times I stopped using this and used a different cleanser are the times my acne showed up again.
What I do is I first use an oil cleanser to remove my foundation and other makeup (only if I'm wearing makeup of course), wipe that off with a cloth, rinse my face, then cleanse with this. For moisturizer, I've used the Positively Radiant moisturizer and I loved it, but I'm currently using the Simple Replenishing Rich Moisturizer since it works just as well for me and it's a bit cheaper.
This cleanser leaves my skin feeling clean with no residue, but it's not drying. I feel that I should use a moisturizer afterward, but it's not overly drying and I could definitely get by without a moisturizer afterward without my skin feeling too tight or uncomfortable if I needed to.