No prob! I read quite a few articles on various forums before taking a look inside to see what sort of voltage range I needed to stay within, and that's when I figured it out. Most of the articles were indeed suggesting a step-down, which surprised me as it only took opening the thing to see that it's not necessary. At least for the Saturn.
I do believe there are systems for which it is a wise idea. I think some of the older systems with external AC adapters do have a far narrower range of acceptable voltage input, but don't quote me on that.