I bought this base about a month ago. I’m general it’s a nice base. However, I bought it in king size. The base has four legs for all sizes, King, Queen etc. I think with the king size base it’s should have at least 5/6 legs because of the size and because it’s much thinner than other bases. When sitting at the foot of the bed in the middle you can feel the base sink a little. It wouldn’t sink if there was a leg in the bottom center. The mechanisms seem to be working fine as of now.