I really don't like this ladder. It does not feel sturdy on my kitchen floor, as it slides, and I'm too nervous on it to climb more than a step up. This makes it useless to me for changing lights. It doesn't do much good to have a four-step ladder that feels like it's going to slide out from under you. I also think there should be a brace connecting the front of this to the back, like on a traditional ladder, because it feels like it's going to splay open. There is no way this thing could hold a 330 pound person. As it's probably too late to return it, I'll probably just donate it to charity or something. Not happy with this purchase at all.