It is a huge benefit and a massive hindrance at the same time. You can get pretty detailed info in practically real time when you have questions which is nice for last minute questions and planning because there are so many people to draw off of for information. The downside is sifting through a lot of nonsense and pettiness, repetitive and lazy questions, and determining who actually knows what they are talking about and who doesn't. I have been an on-and-off member of several groups on Facebook really just to ask questions when I need to and quickly look through photos to discover areas I may want to go check out. Some are moderated much better than others and that can make a big difference in the irritation factor.
Now where have I heard this story before. It sounds vaguely familiar.
Tim