Bhai every one have their own opinion, but i recommend it for cleaning early and regularly. Its not recommended by professionals to remove as it serves several works.
And one other thing is i personally feel alot of difference in car power after cleaning the catalytic converter. so guys its on your choice but do listen to a car noise and other circumstances before removing, Japanese if sent this stuff its worth for some thing. Pakistani just know to remove and remove, i don't understand why Pakistani people say remove. every thing have a purpose. for example thermostat valve in cars are removed , it serves a purpose. same catalytic serves purpose. Else my work was to tell you guys rest your cars and your personal decision. NO OFFENSE