I use Swarm every where I go around the world. It's a fantastic way to keep track of where you've been, places you love, and saving your favorite nom-nom spots! If you want an alternative to Google automatically tracking every place you go to, plus gamification, this is it!
I've been a Foursquare lifer since my first iPhone. I was even one of the few people who thought separating Swarm and City Guide was a smart move! I'm happy to see continued improvements and user-focused changes. I'm excited to try out the new Saved vs. Visited lists and the new place pages.