I went last year and it was quite cold, but fun. The fireworks were excellent, they come from Universal, IOA, and Citywalk at the same time. Although yes it was crowded. On the way to the parking lot we stopped solid with the streets filled with people, then moved a little, then stopped. But the rides at IOA last year were less crowded than I expected. I remember Hulk and Dr. Doom being around 20 minutes around dusk. Go for it, it's fun!