If you appreciate having a good navigation application in your smartphone, you will be happy to know that Nokia Drive and Nokia Map are included in the new Nokia Lumia 800 and Lumia 710 Windows Phone 7.5 Mango smartphones. The Drive and Map app seem very similar to the MeeGo version found in the Nokia N9 and that is a good thing. I've used it quite a lot, mostly on my Nokia N950, and it really does work great. From someone who uses satnavs extensively, I found that Nokia's navigation apps are amongst the best, if not the best.
The only thing I've found missing in the Drive app of the N9 (and the N950), is favourites. The ability to find the destination and check the root beforehand, by using the web version of Nokia Maps, and then save it as a favourites which you can later synchronise with the Nokia Maps on your smartphone, has been a great feature which I have used extensively. For this reason I find it rather hard to understand why I can't access these favourites on the Nokia Drive app. What I need to do, instead, is to use Nokia Maps app to access the favourite and then tell it to navigate there, after which Nokia Drive is launched. It just seems so cumbersome for me.
Also, the fact that on the Drive app I cannot choose the destination by manually selecting it using the map is frustrating, especially when I know the location, but I don't know the name of the place nor the best way to get there. These issues I have only with the N9 (and N950) version of Nokia Drive. I haven't tested the Nokia Lumia 800 or 710 yet, so I don't know if the Windows Phone version will have these issues too. If they are there, I really do hope that they will be addressed in future updates. Unfortunately for Nokia N9 and N950 owners the current info seems to be that Nokia Drive will not receive any significant update.
Anyway, apart from these issues I have with the Drive app, having Nokia Maps and Drive is a great asset indeed. They might not be perfect, but certainly are one of the best in the market currently. So, for me at least, the availability of Nokia Drive and Maps in the new Nokia Lumia line, has given an extra reason to give a chance to Windows Phone "ecosystem".