Syogun is probably one of the few AYCE sushi joints that actually offer greater quality sashimi. (Though once in a while, I find some varieties are still served frozen.) They also have unlimited sweet shrimp sashimi! Coming from an avid AYCE sushi eater, finding sweet shrimp sashimi is pretty special.
I'd have to say that their rolls and other menu items aren't very significant, but their sashimi keeps me coming back. To be honest, I find myself coming here only to have multiple rounds of sashimi and not much of anything else.
The service is decent, though servers could definitely be a little more attentive. I'll also note that they usually don't serve you the same amount that you actually ordered, for sashimi at least. Fine with me though, I can stay there all night until I'm satisfied... :)
Syogun is worth a try if the thought of unlimited sweet shrimp sashimi excites you!