There's always some time when you're wandering around looking for people and while randomly wandering a festival is sometimes the most fun, it's not so great when you're trying to find someone. I once spent FOUR HOURS at the "Meeting point" at Glastonbury with what felt like 25,000 other people looking for my friend Steve. He was there for most of the time! My Totem Compass experience was mostly great, the learning curve for the UI is a little steep but that's always the way with simple interfaces. Once I'd got a handle on what the controls did/meant it felt very natural. Overall, I feel way less panic about where the kids are, especially as they get a bit older and want more independence!