You can zero in on a area on the map but no pinball locations are displayed as that is updated if you are not in a wifi area (macca's, gloria jean or home) or do if you do not have roaming internet access.
I have a wifi only ipad so I can do the research and then write it on a piece of paper to go hunt down a location - for the money still worth it as I found a number of public pinballs in my area that I was not aware of let alone in an area that I may go to for holidays with world wide sites.
Awesome spend of $0.99 I think.