Questions about "Nandroid" backups I have a nexus 4 and I'm having issues with Android 5.0 so I was thinking to go back to 4.4.4, but first I want to backup the current state.

Before I do this, I have a few questions:


if create a full nandroid backup with Nexus Root Toolkit, then Flash 4.4.4 + unroot, then change my mind and restore the backup, will the Phone be in precisely the same state as before? Meaning Android 5.0, same apps installed, no lost config etc. ?
can i switch between backups as I please without any side effects? Like restore a 4.4.4 backup, then restore a 5.0 backup ...
can the contents from these backups be visualized on the computer?


thanks
Good Thing you don t have a Samsung (KNOX wont let you easily downgrade).

To answer you questions to a certain extent:


depending on how you did your nandroid backup 
it won't be "precisely" the same (e.g. most users dont backup the Cache).
no, but maybe you don't want the "EZ-backup and Restore" procedure - Sounds to me like you would like a "dual boot" maybe? If so see this thread:
http://forum.xda-developers.com/nexus-4/orig-development/mod-multirom-v24-t2472295
define "visualized", you could copy the backup to pc and see the backup files. is that what you mean?