How hard is it to transfer everything from an iPhone? My wife has an iPhone 4. She's due for something new, and I want her to get an Android just so we have the same OS.

She's concerned about losing contacts and her iTunes music. How hard is it to move these to a new Android?
Music can be easily copied. Just open the folder where you keep the music on your hard drive and just copy &amp; paste it on your Android device.

For contacts and calender, check this Google Help article (screenshot below):