I was a Scout for many years and enjoyed it, and even though I never really focused on advancement, I got a lot out of it. I particularly enjoyed Order of the Arrow when I was older.
I was perhaps in a slightly unusual situation because troop membership declined sharply when I joined (due to bad recruiting practices). When recruitment started rising again, that left me as the oldest member by far, with the rest of the troop at least 2 years younger (most of them 4 years younger). While I didn't really have age peers there, I think that ended up working out okay. My role ended up being much more advisory (think more Junior Assistant Scoutmaster than Senior Patrol Leader).
If your kid is excited about joining, I'd tell you to go for it. It's also a great way to be involved in the local community (if you aren't already).
