Should students be allowed to use calculators?

I was reading the most recent newsletter from currclick I thought it was interesting that out of the other over 500 families pulled there was a pretty much even split over the use of calculators.

In my own house we haven't use calculators to much but on occasion it's called for, just mainly because I want to introduce them to calculators and some of the functions available. What's your stance on calculators? Yay or Nay