Same problem from this side!
I can verify the problem in reverse--brought my US straightener to Ireland last year, and even with adapter it would not heat up.
My mobile phone would charge up using the adapter, but no luck with the hair appliance, so it was french plaits and chignons for me!
Conair is the brand I use, so I can recommend it. I have a good one and a cheap one, and it is just fine, too. It was the cheap one I brought overseas (just in case it fried) but I'm certain that I would have had the same problem with the good one.
Don't know when you're going, but there is almost no point to the hair straightener in the spring and summer months; as someone else tried to point out, it is a pure waste of time and energy (I know, I know, try explaining that to a 16-year old). The only time I bother is in Oct-Nov when we visit for the Food & Wine Festival. Even in May, by noontime or sooner, hair starts to fluff up and curlies make themselves evident! Also, in that kind of heat, I'd rather have my hair away from around my neck.
Have fun!