Agree w/ Shegan.
I have two little ones and the house we moved into has a deck mounted fauced in the kids bathroom w/ tile countertop. Looks nice, but when you actually use it, you see the problem. Wash hands, water drips off hands onto tiles when you turn off water. Water sits there, soaks into grout.
Repeat several times daily.
When it comes time to redo the bathroom, I'm planning on going for a cultured marble top, or if I decide to blow the budget, get an undermount solid surface unit.
Just personal opinion on this issue.