How can I be sure that the Comodo online servers are safe?

Hi, I just installed Comodo firewall & antivirus on my PC. I accidentally clicked “use Comodo Secure servers as a proxy” during the installation. I want to know how to change this back to normal, because how can I be assured that Comodo’s servers are safe?
Or, can somebody break down the benefits versus the cons for using the servers? I have searched with no luck.

Thank you in advance.

Hi, Take a look at these threads, they should be able to answer all your questions.

Comodo´s Secure DNS [Merged Threads]

Comodo Secure DNS: Enable & Disable Information