I got it today. It's fun, but my phone can barely handle it. It's the first of it's kind to do this sort of thing, and I feel like there will definitely be lots of imitators in this field. I agree with scrabaniac as well though, I feel like there's lots of risks with this app. Someone found a body whilst they were playing it and that's only been a week. Perhaps it's just English pessimism.
Nonetheless, I haven't played Pokemon in years but this has rekindled my interest, it'll be fun to see how they evolve it. And it's nice to see Nintendo's share prices go up again (as a Wii U owner
)