personally i decided to do my own hair and i sooo wish i would have gotten it done. i straighten every day too, and my curly look is not the gorgeous springy curls that some girls have but more of a hot messy frizz-tastrophe. i always forget that the "air-dryed" look that happens in mexico is totally different that what i end up with at home.
if your room is VERY air conditioned, you should have no prob straightening yourself, but if you're like me and the room is even a little too warm, the straightening just wont work right.
plus, if you pay someone else to do it and you dont like it, at least you wont be mad at yourself for messing it up, you can blame the stylist