Here maps is the app that bundles with the Windows phone I believe. This single application is the main reason I score Nokia's Lumia series -1 out of a possible 0 to 5 score, where a score of 0 indicates the product is so defective that owners should request a refund from the manufacturer.
The phone doesn't do a single thing well, but at least most functionality doesn't involve you reentering the destination while driving every time the screen sleeps. It does other things, like recalculating your route because you just passed under a bridge, meaning your are obviously now driving on the bridge and a number of other equally as amusing quirks.
There are Samsungs, there are Apples, there are Blackberries and $30 asian smart phones, they all do a better job of mapping compared to Here Maps. I really like Uber's service, but I don't expect it to improve with the involvement of a new, extremely defective mapping system, and I don't think users of the service will be very happy if they have to start interacting with this application.