Granite or engineered stone/quartz is great looking and an excellent choice for high-end bathrooms and guest baths. But I am still a large fan of cultured marble with integrated sinks when it comes to high-use bathrooms for kids and the like. It is not your "mom's" cultured-marble of even a few years ago as the choice in colors/styles/patterns has been multiplied several times. It makes good sense and extremely cost-effective...so don't rule it out without checking it out.... Tim

I agree with the undercount method, they are unsanitary.. but alas, hard to beat the beautiful design options with under mount sinks on the market.

If cleaning concerns you, Id encourage you to look at Corian solid surface - they have come a long way and now have colors that can compete with with marble and granite while still offering the option of an integrated sink.

If you buy the very inexpensive models, they don't retract well at all from day one, even though they do have the weights that are mentioned above. Buy yourself a good quality one, and you won't have issues. Also, good tip from Benjamin...make sure the hose can move freely, without getting hung-up on other plumbing, like the angle stops....