I don't see any cons, if you use a clarifying conditioner for any buildup you might experience. If you try conditioner washes and it doesn't work out you can always go back to shampoo. I was conditioner washing only for a while; but I used too much product to never shampoo. Now I shampoo about once a month. But, now that I am 100% natural I may go back to conditioner washes only. My hair does what it wants, so I go with the flow.