Benefits of Cicular Polarizer (CPL) Filter

Circular Polarizer Filter aka CPL filter is well known amongst landscape photographer. Well, I am not a landscape shooter but I may start shooting more of it though. Purchased a CPL filter recently and decided to give it a simple and short test.

Some say that CPL enhances contrast and brings out bluer skies! After some test, I can assure that yes it does make the picture more contrasy!

Below is without CPL:
This is with CPL!!!!
Noticed the difference? Both picture has been slightly brighten during post processing.