My wife and friends and I love Shuseki!
Whenever we would have friends come visit us in Las Vegas, we would always head out to Shuseki for late night dinner. It was usually what our friends were looking forward to doing when they came out.
The menu is written in Japanese so it's a good thing they have pictures for every item. We always ended up getting the same things every time so we got used to order them. Definitely order the potato croquettes, they are one of my favorites, and just be adventurous. The items on the menu are usually pretty cheap so we would order a ton of food family style for the table and just have the server start bringing it out as it was ready.
The service is probably the worst part of Shuseki. It's really hard to get your drink refilled and the servers are usually running around so much that it's hard to get their attention for anything. If you really need something, you have to really have to flag somebody down. That said though, I love Shuseki and will continue going there whenever I head back to Las Vegas to visit.