This is a great harness for 5-10 year old kids in gym climbing or outside toproping. It is simple and has the fastest harness we know of to put on and adjust to the right size, thanks to the self-locking buckles. It works for a wide range of ages and weights (up to 88 pounds). It is intuitive where to tie in and how to adjust. This is handy for large group situations where even non-climbers can figure out the harness pretty fast. Because the tie-in points are relatively high, it keeps the climber upright and makes it hard to flip upside down or to the side. The main disadvantage is that it is not very comfortable; you don't want to hang around in this harness for long. It is more appropriate for beginners who mainly climb in the gym and less appropriate for outdoor climbing because it is not comfortable, has no gear loops, and is more awkward to belay and rappel with. A much better harness for those applications is the Black Diamond Wiz Kid. The Simba is also expensive for what you get; the Wiz Kid is a lot more harness for $15 less.