Selena,
I actually made the trip to Woodbury Commons last monday (President's Day), and the sales were great!! It was a very "worth-it" shopping trip. The outlets were amazing, and Juicy, Banana Republic,
Coach, Burberry, had great sales just to name a few. The only thing I have heard from other girls on this forum is that sometimes the outlets have similar pricing to the actual stores, and may not have a ton of good sales. So, from my experience I think that at amazing time to go is on a holiday weekend where they have sales on prices that have already been slashed. But, if you are just going to go up on a regular day, I would still say it is worth it- you may find something amazing!!