Mine is one year old. I'm having a huge problem with the front narrow bottom part getting dirty, and none of my brushes reach it. The minerals in the water sit there and have made a deposit that I can't scrub off (with an old toothbrush.) You can't drain all the water to use mineral cleaners, plus I don't want to etch off the porcelain by frequent scrubbing. Anyone dealt with this? The toilet flushes very well with little water and is quiet, so otherwise I'm happy with our choice.