My little guy is three months old, rolls over, and I'm still using the free diaper bag that the evil infant formula company provided at the hospital. In the quest for the perfect diaper bag, (which doesn't exist), we concluded that the inside of the bag has to be light colored. Black lining makes the inside dark and things hard to find.
Also, most inexpensive bags have really cheap zippers. When you buy products with zippers, look for YKK on the zipper pull- then you know you have something good.
What do you think about this bag? What's the most important feature to look for?