I've had it done a few times and would recommend it for anyone with a really serious "back-up" problem. You don't have to get addicted to it - just do it until your body's functioning right.
It's an eye-opening experience, literally. You actually see what's coming out (through a glass tube, so no odor) and I realized I am producing a lot of bile because I take medications.
Although I really dreaded the idea of it (I have "issues" with that area of my anatomy) it wasn't painful or traumatic. It wasn't pleasant, but it wasn't unpleasant either. The water is warm, so you don't really feel it.