Personally, I feel this specific location is under staffed which could be the only logical explanation why there is always bad service during busy hours.
I found that even during slower hours the staff forgets about tables. I've noticed that they have had "now hiring" sign for some time now too.
To add, the sushi is very expensive and at most right below average for the average roll count and freshness. For this reason, I opt out of sushi.
I do highly recommend all of their ramen dishes. Specifically, the spicy miso ramen. The portion is big enough for two. Their option to add an extra side is also a great deal. I typically pair with the gyoza dumplings.
Overall, if you are looking for a great out of this world sushi this is not the place for you. If you don't want to spend at least $50 dollars on 4 plates of sushi, this is not the place for you. And if you are expecting to have great service for the money you spend this is not the place for you.