The new map app is nice used it earlier tonight. I don't use Siri on my 4s so I couldn't tell you if it's any sort of improvement.
I tried connecting to my home wifi after the update and my phone kept directing me to connect to a "hot spot" and that page was no longer available... Had to forget the network and input my home wifi password again.
The App Store looks better.
On the bimmer post app there is now a button to see recent posts.