Okay, so I always said I'd never get one of these. Thought they were lame, controlling, belittling, embarrassing, etc. However, once our 3 year old started running off on us in public places, I started considering this idea more. Well, just a week or so before my wife took my daughter to Disneyland, she had her run off and couldn't find her for several minutes (even though it was just an uncrowded grocery store). So, we decided the pack and strap idea would probably be necessary in a crowded, crazy theme park. The pack is a little smaller than I thought it would be, but honestly that didn't bug me because we needed it less for carrying items and more for restraining our sprinting spawn. I'm happy to report that the backpack did the trick in Disneyland, and not only did it prevent her from running off, it's even helped us "train" our kid from attempting it. At this point, we use the pack as a consequence (aka threat), and our little one hasn't run off on us since. So while I wouldn't use this while going out for walks or simple errands, it was a lifesaver for busy, crowded areas/events.