I think they look cool? *shrugs* Originally I figured hoods would be a head slot item, not part of the chest piece, but then I found out otherwise. Ideally you'd be able to raise and lower the hood, but I personally would like to be able to see the hood visual on my character.
If the race option had mentioned under Twil'lek - hood graphics will not function, etc, I would have considered playing another race for my main character. Since there is no note of that and I do recall seeing Twil'leks with hoods in youtube videos and screenshots, I am curious as to whether or not the change is permanent or not.