We installed one against my father-in-laws advise about a year ago and are going to replace it. It has developed hairline fractures (although it does not YET leak. You have to be very careful with not putting anything hot like pans, pots etc in this type of sink. Also, to keep it looking good you must constantly polish it with Corstone polishing cream.
Best bet in my father-in-laws (kitchen designer) opinion is to get a highly polished stainless steel unit which will last forever...after all it is unit that must take some abuse over it's life. Polished stainless can look nice and after all itís service and function that you need.