For, if you wanted to go north or south, it's a huge detour... and a time waster.
a) Noise - it's really quiet; be it inside or outside as you wait
b) Station Restrooms feel like a shopping mall experience from the outside; not like some after thought.
c) Visual Guides in the train sets - finally, we have it!
d) If you own a OneCard, then parking is cheaper. See here
However, I found some pet peeves:
a) I can't pay for parking via TnG. It's using the old ticket vending machine style.
b) G for station. Really?
Unlike the KJ LRT line, you can use TnG cards at the MRT. Seriously. What's up with these people? Previously, you could use TnG cards on the LRT. But now, you can't. Madness. Why can't we have a solution much like how Hong Kong or Singapore has???
Is it worth it? I would say that once the second phase opens up (connecting Semantan to downtown KL and onwards), it's not surprising then if ridership goes up as I'm sure many stay on this side of the world and would like to ditch their cars behind...
It's a long time in waiting... :)