When the craze hit we all got this at where I worked and walked around playing it, and in the office. Man that was funny, but because we were in a kind of rural area there just wasn't as many people playing and it seemed like it relied on that for it to work well. So I didn't get far.
What kept you playing?
To be honest, I uninstalled and reinstalled several times. But it was the raids and the community around them as they require collaboration that brought me back.