6 months ago we remodeled our bathroom and installed a Santa Rosa 1.6 GPF white toilet. It fit the room well but we have had several issues with it. The tank cover did not fit and showed unglazed material - Kohler had to send us a new one, the seat cracked in a very short time - Kohler had to send a new one. The one issue we still have, and I believe will ALWAYS have is that the bowel always looks dirty. It develops a brown ring at the water line in just a couple of days after cleaning it. I am not happy about having to clean my toilet every 2 days. There are only 2 of us in the house so it does not get extreme use. I have noticed that the bowel fills after flushing and immediately drops approximately 3/4 of an inch and the ring forms at the original water level. We have not found any leaks or any way to adjust this. We should have spent that amount of money on a different brand. Not happy with this product!