Kindel, who left Microsoft this year to start his own company, wrote a blog post "Windows Phone is Superior; Why Hasn't it Taken Off?" detailing the reasons he believes that Windows Phone 7 sales "appear so lackluster." It has nothing to do with technology, he says, because he believes that Windows Phone 7 is superior to Android, even though Android sales have skyrocketed, while Windows Phone 7 sales have lagged.