Neil,
There is one minor "problem" with SuperDuper!. It does not backup the Recovery HD partition, and thus when one does a restore, there is no Recovery HD partition on the drive. (Carbon Copy Cloner does back it up, and can restore it). Myself, that is not an issue, as I have an excellent freeware program that can create the Recovery HD partition.
I recently had a "Bit Coin" virus issue with my Mac Mini, and even after doing a restore from the most recent SuperDuper! backup I had (and re-creating the Recovery HD partition), the virus reeled its' ugly head again (to this day, I have no idea how I contacted that virus, as I have never used anything connected with Bit Coin. I also was having memory issues). So, what I finally did was to Erase, Format, and Partition my internal drive (a 256 gig SSD), then did fresh installation of Yosemite (OS 10.10), applied the OS 10.10.4 Combo Updater (Cory recently pointed out an easier way of doing those two steps at once), and then used Migration Assistant to migrate all my non-system stuff from my most recent SuperDuper! backup to the SSD. The virus and memory issues went away, and I also had the Recovery HD partition created with the OS 10.10 installation.
I am considering following that same approach when OS 10.11, El Capitan, arrives. That is, boot from the latest SuperDuper! backup, use Disk Utility there to Erase, Format, and Partition my SSD (actually the same process on both of my machines), install OS 10.11 (thus getting the Recovery HD partition), and then using Migration Assistant. No matter how I get to OS 10.11, I of course need to insure that all of my third party software works with El Capitan.