I get it. It's a landmark. Cool to take some pics, but really, nothing more to it.
It's worth visiting once so that you can see the massive dam. But the traffic can be a real pain in the neck since there's really only one road in and out of this place.
I guess a cool thing is that you'll cross the state line to Arizona from Nevada when you visit here.
But like I said, just a one shot visit is sufficient.