I'm playing on iOS, and while the game part is questionable and the UI is occasionally incomprehensible, I am having a lot of fun. Traveling to and hacking portals is great if you live in an area where they're relatively close together. I go out on a bicycle, which works well because I can cover long distances while still being able to go places that cars cannot.
The biggest issue with the game now is the Resistance players far outnumber the Enlightened. As an Enlightened it's frustrating to see almost my entire city is blue, and whenever I capture a point it's usually taken back hours later. Of course, since there are so many portals leveling isn't difficult, but it still takes time. Without a balance in the player count there's still going to be a pretty huge gap in the overall standings.
Also, I had a real-world encounter and that was wonderfully terrifying.