>Is there really some point in sitting and trying it all day long? I mean, if you cannot "get" it within an hour, aren't you doing something wrong? Or it takes different length of time for different people?

Disclaimer: I am more a follower of Zen Buddhism.

There is no right or wrong. The goal of this, any other forms of Buddhism, is satori. It can take some people a year, some people a lifetime, but at the end, practice and satori are one.