My Lumia 920 is going back as soon as I find the charger it came with. It's a well-built phone with a great screen, but it's not polished enough to be the game-changer that Nokia/Microsoft need it to be. It's huge (60% heavier than an iPhone), and the battery life is very questionable (despite a battery 40% larger than the iPhone 5). If I leave it on standby for two hours, I can never tell whether it will have blown through 2% or 20% of the battery in the meantime.

WP8 is slick in some ways, but it's not polished enough for prime time. Take for example the text messages app. Who decided that the chrome should take up so much space that you could only see 1 message in portrait mode (or zero in landscape) with the keyboard open? On a 4.5" screen?! There is no good app for Google Talk; the few that do have it on the Microsoft Store have weird issues (flashing while redisplaying content, logging out/in every time you switch to another app). There are no apps to access OWA accounts (if your Exchange server has ActiveSync off, tough luck). Integrating the "back" feature on your apps and on your browser is an idea that wears poorly. The "people" app is kind of cute, but jumbling Facebook/Linked-In/etc together with your contacts is an idea that sucks more the more you use it. I'd much rather be able to see peoples' timelines than be able to post the same message on Facebook and Linked-In at the same time... The UI is slick but lacks landmarks to help you figure out what's going on on-screen. There are weird and questionable choices throughout the UI. Who decided "+" was the right icon for a new e-mail? Etc.