It's been a while since I've been to Casa Sushi but it's not for a lack of this place beeing really damn good. I guess I've just been seduced by the siren song of AYCE sushi and this place doesn't have that option.
That being said, Casa produces some superior quality food! Of particular note is that their Beef Tataki is the best I've had in this city and some of their other unique and unusual dishes are also very very good. Speaking of which, how often do you see a Sushi place that innovates? :P
Honestly, this place is great and I have no idea by which standard some of the poor reviews are writing from because you'd be hard-pressed to find a better Sushi place without going to a fine dining super expensive place.