I don't know of a single GPS/Map product (website, device, app) that hasn't had issues....
Google maps still has incorrect labels for my address even though it correctly puts the pin in the right location on the map.
Mapquest, several years back when it was considered the standard, took me down a dead end street from the north, where it should have taken me up a dead end street from the south. It was a 45 minute mistake, funny thing the two dead ends, still have yet to be connected are only a couple miles apart.. Of course I learned all of this the hard way...
Navigon/Garmin takes me to the center of town if the address is 100% recognized... it doesn't even tell you if there's a mistake... But at least it doesn't need reception to work...
Key thing, review the directions before following them...
I did use Apple's map app tonight to take me to a local bar that I hit at least once a week.. it did fine for the simple route... My biggest complaint so far is the lack of traffic information. Google maps clearly excelled in that, but I understand that Apple wants to improve the app and at least have the same features as Google maps on Android.