To begin, I think rating a sushi buffet is quite different than rating a typical a la carte restaurant. I think it's quite common to expect a pretty below average service lol, and if you do go on a weekend night, then also expect the high price combine with even slower below average service. BUT! It's a sushi buffet so let's talk about sushi!
I've being to this place a few times now, and I always order with my friend plenty of sashimi! Personaly, they have one of the best sashimi in town. It's cut in a beautiful portion and tastes delioosiosoo! Their signature sushi is also amazing. Their rice to sushi portion is well controlled unlike other buffets thst puts way too much rice. As for the tempura, it's good but not my favorite since it's served in quite a messy way.
In the end, if you came for sashimi and sushi you won't be dissapointed. If you came to be served like your royal highness, then you clearly didn't realise you came to a freaken buffet.