I bought two San Souci. The flush is strong and efficient. When cleaning them, I discovered one toilet has perfect holes under the rim of the bowl, but the other one has a bunch of holes that are either blocked or only partially opened, which means down the road minerals in the water can more easily narrow them, no matter how gradually. I wish the second toilet was not like that but we have already been using it for over a month before we realized it. The factory shouldn’t have missed this flaw.