I thought the game was fine and I played for a bit. I already played Niantic's other game, Ingress so I already knew where all of the pokestops and gyms were right off the bat. in fact there are a handful of portals I had submitted and were accepted for Ingress that wound up being pokestops and gyms.
I had gotten pretty into Ingress and joined some of the Google+ groups for it and even made a couple of friends. Pokemon Go was just too many people all at once. Some smart fellers (or fart smellers?) had submitted a butt ton of Ingress portals int he town cemetery so guess where all the pokestops wound up? I saw lines of cars driving through the cemetery 5 or 10 cars long lines crawling through people playing the game. I thought it was a bit creepy but also a little neat because at least people were visiting and doing something fun outside (at least some of them) and they may have remarked on some interesting burial plots or possibly re-found a nearly forgotten family member's plot.
But it was a battery hog and I didn't have as much time to just cruise around flinging pokeballs. I felt like Ingress had a better early battle type thing - you weren't going against individual players you were going against portals that had defenses so you would farm xp by walking around and get items off portals, build your own portals up and then link them together. there was a lot of collaboration in Ingress to get higher level portals and build large MU control fields. I was in FL for a time and I recall a field being built from Miami to Orlando to the Bahamas. that was pretty cool.