I haven't been there myself and don't plan to go, but know people who have been, and they uniformly report a positive experience. Personally, I think the discipline of, for example, saying a daily rosary, meditating on Scripture, reciting the Divine Office, or taking a more active role in one's parish, is of far greater benefit than apparition-chasing.
This is what I don't understand. The idea of these kids doing this for fame or something just strikes me as simplistic and silly. The idea that it's something demonic also doesn't make sense -- why would Satan encourage people to pray to Jesus? The whole thing is very confusing to me. To simply say, "it's a scam or a hoax" without answering all these questions just doesn't cut it for me.
I looked at his website. This Jones guy isn't all that convincing either. Is this all you've got?