I love my cabrio. more fun per gallon(fpg)!
It seems to be less mpg with the top down, at highway speeds, which is expected due to aerodynamics.
Of course a hard top is much better than no smart at all!
Do what you need. It's nice having the option of putting the top at the exact amount open that you want. At noon I can open it just enough to see the sky but still provide shade for my happy head.
You can impress gawkers by secretly opening it from the remote!
I was all set to buy a hard top at the dealer, but in the final moments switched, making them fill out all the paperwork. I have no regrets but haven't made that first payment, which will be about $80 more a month.
But I think, had I bought the hard top, i would always wonder what I missed...
I've still got a pure reserved for next year, and I wonder if I will become a two smart family...