So long as their AC input is able to handle it (you can find this on the underside; it should read AC Input = 100-240V 50-60Hz), you shouldn't have any problem. Definitely double-check, though, so that you don't create potential problems.
I have used this for a while, and have written about it, along with some images of the solution in action.
[robg adds: I wrote about the sheer number of things I pack for even a short trip a while back, so this hint is of interest to me. And while not directly OS X related, it's related to using Apple hardware, and I thought it might be of interest to others ... I guess the rating will eventually answer that.]

