I bought one of these things. What a mistake to make !!!!! The pad sticks and drags on the ceiling. It does not cut into the corners well enough and the overall finish is awful. I went back to my faithful brush and roller. My advice is don't waste your money. And as for Tommy Walsh's endorsement Let's just say I will not buy anything else that he promotes.
Just buy yourself a good paint brush and roller and do the job properly.