Ichiza is for the most part ALWAYS packed.
I agree with most that this restaurant is over-hyped. Their food doesn't taste as good as it used to BUT I would still come back time and time again. I don't dislike anything on their menu and love love that they have daily specials. You have a lot to choose from when it comes to dishes and their prices are reasonable.
The restaurant's concept feels authentic and comfortable.
Some of my favorite dishes are:
Garlic chicken gizzard
Kimchi fried rice
Stir fried udon
Kim chi fried rice
Beef tataki
The honey toast is a must have for dessert. So delicious. So simple. Ask them to lightly toast the toast otherwise it'll most likely come out burnt on the outside.
Service is a hit or miss. The restaurant is quite small and there aren't very many tables so you will most likely be very close to another party...but that's apart of what gives Ichiza it's authentic feel. (Restaurants in Japan work with very little space also) If you're coming with a large party try to call ahead of time to see if they are able to accommodate.