Same standard navigation apps that are on WP8. Nokia Drive is available. Not sure if you will get Drive + as you may have to pay for it. The Nokia Maps is there along with Nokia transport. Again, what exactly about Samsung do you hate so much? Remember, you can still choose to go buy a 820...
I hate Samsung because corporate stuff. Since ever they only cared abour high-end Android devices, made a billion low-end/mid-end every month and 95% never got updated. Along with that Touchwiz AIDS. Since Android is the big wagon they like and its that mess, I have fear on whats left with Ativ S.
However I always liked Nokia even before smartphone trend, and they are the lead on WP. But I don't know if I can give a free pass on the 820 just because its Nokia and ignore the other qualities of Ativ S just because its Samsung.
Others have mentioned GDR2. Is this available to everyone now or being dropped slowly? And Amber Update? Sorry for all the questions but I'm really on a lockdown on this.