Jonathan Ive, who is now Senior Vice President of Industrial Design at Apple Inc., praises  Windows Phone fondly on WWDC 2013. Read quoted text below:

“…I think there is a profound and enduring beauty in simplicity, in clarity, in efficiency. True simplicity is derived from so much more than just the absence of clutter and ornamentation. It’s about bringing order to complexity. Windows Phone 7 is a clear representation of these goals. It has a whole new structure that it is coherent. and it is applied across the entire system…”

Watch the full video here.