I leased a 2013 Leaf S for two years.
Numbers that I used to make my decision:
$310/month all-in (15,00 miles/year, GA one-time "ad valorem" & sales tax, $0 down payment, $7,500 Federal tax credit included)
Gas = $3.50/gal
Miles driven/month = 1,250 (I actually drive that or slightly more...