I got a little silly last week and bought an iPhone 6 as well as an iPad Air 2. I Synched my both through iTunes, expecting a complete transfer to the new devices. That was naive. Some apps were deleted. In the case of the the iPad Air 2 it was half a dozen. I had to go to the app store and download them all again. No charge, but why? More irritating is that none of my settings were transferred. I have had to re-enter my logins for everything. DropBox, Evernote, Waze, just to name a few. This is annoying at best. On occasion when I needed information quickly it really pissed me off. Some of the books I had in iBooks are no longer available. All my music files are now in the Cloud, and I have to manually download them. I expected them to be transferred directly to my new device. By the way, downloading music is quirky, to say the least. I think Apple assumes I am always going to have access to WiFi, but I live in a rural area and often cannot access music that's in the cloud. Sometimes, when I click on a "song" (I find it tacky that Apple insists that a Rondo from a Quartet is a "song"), it downloads, but often it does not. The little circle appears but nothing happens. Silly stuff, like the locations I had in various weather apps were lost. Overall the experience was frustrating and stupid. Nothing at all like Migration Assistant.