We bought the metallic grey 1 & 3/4 sinks through Amazon many months before we started building our house as I was not able to find anything other than black or white here in Australia. Blanco has a very good reputation in the U.S. and Amazon was where I read many, many reviews as at the time, there weren't enough here to find many reviews. (And just as an aside, it was delivered in 3 days!)
I've read here some people have commented about water marks. I normally just give the sink a quick wipe with a damp cloth and it's done. Hardly notic...