I wouldn't say it's an intuitive UI personally. It takes getting used to just like other UI's do. I found that I couldn't fit all the simple stuff on the screen I wanted with WP7 (ROM's I admit), and was continually having to scroll down because it wouldn't fit. I found it annoying.
I've not seen mango, so maybe they have added useful/critical stuff like notifications ? (That were missing from WP7 originally)
Its extremely intuitive, perhaps the easiest to use of all three. I for one are shocked at just how MS managed to pull it off. This is from someone who has an ipod touch, sony xperia x10 and final HTC mozart. In terms of perference for me
- win mobile
- android
- ios.