The 'sushi train' refers to the conveyor belt structure that loops around the restaurant. Dinners sit in a loop around the 'train', single chairs on one side and booths on the other. The booths are hot property, they're great if you've got a large group, but there aren't many of them and you could be waiting a while if you want to grab one. The single seats usually free up in groups of one or two, so if you're dining solo or in a couple you'll get in much quicker.
The dishes that make their way along the train are all on colour-coded plates. The amount you pay depends on the colour. Dishes start at around $3 for the simpler rolls, some sashimi plates are around $8, and udon noodles are between $8-$10. You can spend as little or as much as you'd like, the coloured plates can add up quickly if you're not paying attention.
The range of rolls is a bit more substantial than your regular hole-in-the-wall sushi shops. Of course there are your regulars like salmon, tuna, and teriyaki chicken, but you'll also find soft shell crab rolls and tiger rolls (salmon, crab, avocado, and cucumber, no tiger inside). The takoyaki (octopus puffs) are definitely worth picking up, but don't get them confused with the coro coro croquettes. They both look pretty similar, and while there is nothing wrong with the croquettes they're not as tasty as a plate of takoyaki.
If you're watching the train but can't find your favourite dish, don't despair. Every seat has a menu, you can order a dish you haven't seen and it'll get delivered to your table instead. The same goes for any drinks you want during your meal. You can also order aburi 'flamed grilled sushi', like salmon, scallops, and wagyu.
Sushi Train can be a quick stop if you're just after a snack, or you can come here for a full meal. They even have desserts travelling round their conveyor belt. The line can be off-putting, but if you're after a guarantee that you'll get good quality, fresh sushi, then it's worth it.