Yes, it's very much underestimated. The OS itself is very good. Very good usability, very secure and has some awesome features (can't live without the live tile

Yes, it's very much underestimated. The OS itself is very good. Very good usability, very secure and has some awesome features (can't live without the live tiles!). The hardware is really good as well. In my opinion it's crazy that most developers still skip the platform. There's really no excuse not to make your app cross platform nowadays, Xamarin has a really good offering for example. At least in Europe WP has a market share of 10% where iOS has 18%, so they're not that far off! In the US the difference is bigger though, but the world is larger than the US.