It seems to be pulling in the POI info from Yelp so it's as accurate as that service is. I use yelp a lot so for me, it's working out well. What I do notice it that you have to zoom in pretty close to see more of the POIs. If you have a wider area you are viewing, it looks like there are less POI. I also like that I can add or easily correct something.
Back home in NY, a restaurant I frequent was on the opposite side of the street on the map so I sent in a correction. It wasn't far, just literally across the street. It also listed a little store I had never noticed and wasn't on Google Maps down the street from me that sell french macarons. WHAT? Yes, I went there and bought some. lol
well the problem is, it has like 10 POI for the entire Turkish Republic. When you search for anything, 99% of the time it comes up with nothing and the rest 1% is wrong. Hospitals are the only correct thing in Turkey. I was passing by the biggest mall in Istanbul (probably one of the biggest in Europe also) and it wasn't there in maps. Google maps had all of it, even local cafes, gas stations and all. Now we only have hospitals.
Some province names are misspelled. Place where our business is surprisingly listed as a POI, but it's a business that closed up shop 5-6 years ago. I've reported it, twice in the last 2 weeks. No response or change.
I think the maps app's interface, turn by turn system, siri integration, iOS integration, graphics, 3D they are all great. But they need to throw all of their data to garbage, and get all new, completely new data. They need to learn that the world is not the United States.
Apple maps interface with turn by turn and graphics and all with G Maps data would be the best thing.
Yandex maps data is very good for Istanbul but the interface is so bad, i literally can't understand anything. So, can't use that too. Plus, i can't use routing without turn by turn. Would cause an accident to try and drive and look at iPhone constantly to check out where my turn is. (especially roundabouts, crossroads etc.)