At this time, the REST search API only returns some of the user information that is for example returned in the streaming API.
We currently use the streaming API and fallback to the Search API when needed. However, in the Search API we are missing the "Location" field and others for users posting on Twitter.
Would be great if this could be added.
Thanks!
Updates
This will be addressed one day when the Search API becomes part of the full REST API at api.twitter.com.