Opinions on this: Returnil Virtual System

Anyone familiar with this product and have opinion if it really works as stated?

Returnil Virtual System
RVS 2010 uses a powerful combination of antivirus, antimalware and a virtual system to protect your computer from all types of viruses
and unwanted system changes. While mainstream vendors continue to fight a losing battle against malware, Returnil has taken a
completely different approach to security.

Advanced Protection and Instant System Recovery
RVS 2010 clones (copies) your operating system and creates a virtual environment in your PC. Instead of loading the native
operating system, a clone is loaded that allows you to run your applications and perform your online activities in an entirely isolated
environment. In this manner, your actual operating system is never affected by viruses, Trojans, malware and other security threats.
To return to the actual operating system environment, you just need to restart your PC. After restart, the system will be restored
to its original state, as if nothing ever happened.

 

From their website:
Whether you have an antivirus or not, you still need Returnil Virtual System

That's a little confusing, this would mean you are running two antivirus programs, as they claim to be antivirus as well. Normally a big no-no. confused

Regarding the virtual running aspect, you can also do that with a program called sandboxie, which you can find here at MG.

Finally, I'd be curious as to how much of system resources this takes. I couldn't find anything regarding requirements. Though I did see a statement that this would make your system run faster.:confused Usually claims like that at the least can't be substantiated and often the opposite is true.

But it would be interesting to hear from some people who have tried this.