Every time I'm in Vegas, I go 1-2 times here. They are fairly quick in terms of seating (although there are times when it may take a half-hour to one-hour wait). Food selection is fairly easy since it's just ramen and some smaller side dishes.
The pork in the ramen is really good and they also have great sides like soaked eggs and corn. It's definitely worth getting all the add-in's you want. Give it a shot!