There really are a lot of different possibilities out there for backup.
Not sure about the one mentioned in the Ad. I'd check for any real reviews on the product and/or site to be sure.
But there are tons of options, I mean just tons...
So to be more specific on your end goal... What are your preferences? Learning something, just having something that works out of the box? Dedicated hardware? Just something that'll work for basic backup of data? Something that'll back up the whole systems?
If you want something that'll "just work" out of the box, and you can afford to buy the hardware, and you want it to back up all your data and your systems, and don't want to spend much time configuring, etc, then you might want to look at the different offerings for Windows Home Server machines. HP And Acer, at least, have some systems out there that seem popular in that area.
If you don't want to spend any money, and are fine backing up just the data between your 2 systems, then there are several optinos there. Microsoft has some "sync" programs out there that will keep everything sync'ed between machines on the same network... I've read an article not long ago that reviewed using a combination of 2 or 3 of the Microsoft tools to do just that.
Also, in the same category, somewhat, there's a program I really like for backing up between systems. It's called ActiveSync. The free version is plenty powerful enough for data backups at home - across a network. You can have it run on a schedule in the background.
And other dedicated harware options, you coudl build your own system, and back-up to it with any of the backup tools that support overnetwork backup, or with some of them, you could run the backup software on the backup machine. One nice free one is called FreeNAS.
And there are also external hard drives that come with backup software, some of them (I think) will do so over a network, which would be perfect as well.
I mentioned FreeNas. It takes a little time to learn, but not much. It will run on anything you can turn on, it seems, and once it's running, it just runs. You can run it from a floppy, a CD, a CF Flash memory card, or a standard hard drive..