We're VERY happy with our Karran sink.  You can have over or undermount, and we had it put in undermount.  The people who mounted it put straps underneath it to hold it up.  It will never go anywhere.  We bought the metal grille for the bottom of the sink, so nothing will ever scratch the sink.  We like the end drain, so we have the full sink to use for washing up.  I can get large cookie sheet and roasters in the sink, it's just perfect.  The bisque colour is SO nice in our kitchen, which has oil rubbed brass fixtures and faucet.  We would highly recommend this sink.