We've had this sink now for a few months, and it's been mostly great. We did have one episode where something left in the sink seemed to leave a stain, even after repeated cleaning. But, funny thing was the stain eventually washed away on its own, thank goodness. The surface of the sink does seem to be semi-porous, so we are very careful now not to let things sit in it too long. Also.. as some others have mentioned, it's important to note that the material of the sink feels like some kind of plastic or fiberglass. I was first under the impression that it would have more of a porcelain-like feel to it. It definitely does not. But overall, we're very happy with this sink for the price. It looks great in our new kitchen.