I won't aim to convince you to use it, but only hope to enable you to understand why I do.
When I get up in the morning, the weather is displayed in my notification bar.
When its time to leave, Google now let's me know what time I need to leave my house in order to get to my bus stop on time. It even tells me how long the commute will take and what transfers I need to make.
When standing at the bus stop, it presents me with the schedule for that stop, letting me know what time buses will arrive and what future stops any one of those particular buses makes.
If there's any particular sporting team playing that I like, the current score is conveniently placed in my notification bar.
If I've ordered something online, it tracks the shipping for me.
If I have plane tickets booked, it let's me know if the flight is on time, cancelled, or delayed
That's just what I personally use it for, but Google Now is much more powerful than just that.
In the end, if you think you could benefit from it, give it a go. The choice is up to you. :thumbup: