from what i have heard, the smart doesn't need power steering.
light weight. engine in rear instead of over front turning wheels.
I think the event smarts did not have power steering, and the steering felt fine. i took two test drives in two different smarts, one cabrio with red cloth seats (if it had black leather, it would have had ps), and a blue coupe.
but, i'm not totally sure they did not have ps, so, you cant take my advice as 'your' final answer. keep asking others, if you are unsure, so you will be happy with your order, with or without ps.
I will not order ps, unless i change my mind from pure to cabrio, and also switch from a red or dark gray/black cloth choice to black leather. the latter requiring ps.
im still considering the pure, where the least equip means least weight, least drag on engine, and best mpg.
so, i'm willing to take a chance, and not order ps. I think there is only a 1 in 10 chance, that i will wish I had ordered it, after not ordering it. so, no ps is a safe decision for me.