Gyu kaku is the largest yakiniku chain to arrive in americaland and they set a pretty decent standard of what a yakiniku experience would look and feel like in Japan.
A tip for the Noobs:
You can have the meat marinated and prepared any way you want. I you just say I want the Kalbi. they will just bring you whatever they have done or just the plain cut. I think that most ot the people with marginal reviews here are because the reviewer did not know how to pick the meat.
My favorite meat/sauce combinations are:
Kalbi miso
Harami miso
Garlic sirloin
Toro beef gochujang
Kalbi gochujang
If you aren't sure on the meat/sauce combo, then the best course is to order a set.
I will be honest and say I'm not a fan of the prepared foods that come with the meal sets. The chicken karaage and cheese gyoza are just meh: fried fillers. The sushi is not anything special and I have to keep reminding myself that I'm here for meat not sushi. I don't expect Jiro level sushi but it's still mediocre even for American west coast standards.
Their happy hour is probably one of the best in town especially the late night super happy hour (red prices on the menu).
Gyu-Kaku is now the de facto place to go for Japanese yakiniku in Vegas. Go for the meat and beer and nothing else.
Eat with confidence.