Anyone using "F-Secure Internet Security" ? Opinions on performance?

"F-Secure Internet Security" has a high rating of 4.59 here at MG

If you use it please let me know if it perform well? The features list says...

Features:

Protects your computer against viruses, worms and unknown attacks:
With daily automatically updated virus protection from the world-renowned Data Security Laboratory of F-Secure and the new F-Secure DeepGuard technology that protects you against zero-day attacks and other future threats, you can safely use your computer, now and tomorrow.

Detects and removes spyware from your computer:
F-Secure Internet Security detects and removes secretly installed software from your computer better than ever before, ensuring that your system is running smoothly and clean of spyware.

(I have the paid version of SUPERantivirus...does "F-Secure" work as well???)

Protects your computer against hackers:
You can keep your private data to yourself with the personal firewall that stops hackers from breaking into your computer.

Helps you stay free from spam e-mail and phishing attempts:
F-Secure Internet Security filters unwanted spam and e-mail schemes designed to steal your private information.

Protects your children against unwanted Internet content:
F-Secure Internet Security ensures that your children or teenagers do not enter objectionable sites or surf the Internet when you are not around.

If you do use F-Secure - Do you use it in Combo with a FIREWALL that it works best with?