Hot Rollers vs Hot Sticks

I'll be attending quite a few occasions within the next few months, so I thought of getting a curling tool to help me do something with my hair (as I normally just have it dead straight). Now I'm stuck with the decision:

Hot Rollers?

or Hot Sticks?

I need ones that work with thick and long hair, just like mine.  Big curls would do me just fine. Please help me girls! :)