We were going to have them put in before we even moved in to this house but life got in the way and it got put off for a while. (3 or 4 years)
The old tops were tile (which I loathe!) in a cream color with a dusty rose accent stripe and tan colored grout (well, in some places anyway). The grout was a dingy gray in most areas because no matter how much scrubbing, bleaching and resealing we did it would not look clean.
The new tops are Corian, in a blue/gray speckled (like granite) color. It was a big expense especially because we have allot of counter space. About 3
It is beautiful, all one piece, no seams or groves, and no nasty germ ridden, e-coli hiding grout! It took a week for the demolition, blueprinting, plumbing and reinstall to be completed but it is FABULOUS!