The Office only lasted two series not because it was unpopular but because Ricky was clever enough not to stretch it. Look what happens when you try to increase the lenght of 'popular' comedies such as Friends, Sex and the City and Fraisers. They became stale and suddenly sucked. And some of these shows like Sex and the City was already bad in the first place.
Those who has never watched a single British comedy in their entire life might find the humour a little 'weird'. It is very different from the slapstick comedy of Americana. You might even hate it at first.
The Office is on every Saturday at 10.30pm on Star World (cousin to Sky - grrr...). You would need an Astro subscription to view Star World.