Let me repeat and repeat and repeat. Win 7's Backup and Restore works. It is easy to use, It is free. It is reliable.
Now to your question. I tried all different combinations of backing up partitions (and restoring). Not a single effort failed.
In the last three days, I've been testing different scenarios of backup and restore, of enlarging, of shrinking, of deleting, and of creating partitions.
What I did was first I would make a backup, Then I'd do my experimentation. When time came to restore, I'd do a restore. A couple of times, afterwards I had to so a system repair from the the Recovery Disk but this was due to my changing of partition sizes and locations.
I always use DiskPart to create, delete, grow, shrink, format, make active, assign drive letter to partitions.
I have also used ImageX to create and apply WIM files.
When it comes to requirements that will involve anything more than a simple grow of a partition or no change to partition size, then I work with WIM files.