Zagg Shield & Otter Box?

I just got a 3gs and I also put a Zagg screen protector on it (Only for the screen). After waiting my allotted 24 hours, is it okay to put the otter case on? I've seen some people complaining about how they put it on too soon and the case stuck to the screen protector!!! I wouldn't want this to happen (at all) :(. On the bright side, though, the associate told me to do that so if it sticks then I can go back and get another I think...