I downloaded it and was playing in a small town while on vacation for a bit, smaller town seemed to have more pokestops close together if they have any versus larger city, oddly nothing at the mall when I went to a larger city. I saw a variety of about 20 pokemon although I didn't really move around that much in town. Had phone issues though and currently waiting on a replacement being shipped to me since my phone crapped out on me (Not Pokémon's fault, all the corners are misshapen from the number of drops XD).
I see good and bad with the game from what the internet 'review'. People that didn't have a reason to go out to parks, downtown, or sightsee are getting out and walking around (See One Punch Man phenomenon.) People that for the most part say they're anti-social or have social anxiety now have an ice breaker to talk to people about which I think is kind of cool. I also found on the trek back from the Midwest most rest areas have a pokestop or two, some have a gym. On the bad side of the game there's permissions people have issues with, stories of people getting stabbed, finding dead bodies, or youtubers stating they've loaded the game and run around catching pokemon young people/kids are trying to catch and laughing at them (doesn't work that way for spawning but good for those people for getting a trollish chuckle I guess if that's what they really want to do). There was a story about someone breaking their ankle since they fell in a ditch while playing the game after dark and weren't paying attention. I amount the dangers of the game along with everything else people still need to have situational awareness and still use common sense. I don't see people stopping getting drunk anytime soon in mass due to getting DUI/DWIs or getting robbed when they pass out on the way home or worse.
I think it's interesting and when my new phone comes in I'm looking forward to heading downtown on the weekend and checking out what's out and about and also who.