I'm enjoying it. I only get a few minutes a day and that works for me. It's definitely nostalgic for me - DS1 was obsessed with Pokemon when it first came out. He and I have been having great fun chatting about it, sending screenshots of what we've caught etc.... So for me it's wonderful to have something fun to chat about with my 21 year old son. Worth its weight in gold for that alone to be honest.
We have a poke stop about 150m down the road at our park. I've seen wonderful interaction between parents and their kids at that park who are clearly playing the game. In fact it's the busiest I've ever seen our park which is an awesome side effect!