Join over 125,000 developers building location-aware experiences with Foursquare technology and data.
We tried multiple options and Foursquare was our best option. Plus, if you check their site, there are some very big names who have recently signed up to utilize their technology. We felt good being within that company. :)
Pros:Lots of features
Cons:Little to no dashboard to give you information on API stats.
Scout