Some also keep asking how this is any different than just mining other alts and buying BC yourself. And the answer is simple - individually we are small, but together we are huge.
Its a automated process, No real thinking, no switching, constant watching etc. I never find myself hopping off and on coins by the hour. I just pick ones I like and mine a while. The multipool if its dynamic and fast should be way better at converting hashrate to BC/BTC than a average user could.