I'm sad that the current rating is 2.5 stars! I personally am a fan of Sushi-Q. I used to come here more often when I worked in the mall. I loved it then and I still love it now.
I'm not a fan of sashimi so I usually grab the trays with maki rolls that don't contain sashimi or contain very little (so I can't comment on the freshness of that).
The sushi has always been DELICIOUS. I don't even need to use the soy sauce + wasabi because the sushi itself is already so flavourful and I don't want to drown it in other flavours. I've even left it in the fridge overnight and had it for dinner the following day. Normally when I do this, the sushi rice turns hard, but it doesn't happen with their sushi.
I also come here to buy several small trays to assemble my own party tray for gatherings - the sushi is always a hit (but pricing-wise, it comes up to about the same as ordering a party tray from your average sushi restaurant).
They are always friendly and polite. I've seen the End of the Day Sales vary from 30% off to BOGO and even Buy 1, Get 2 Free (they don't advertise it, but will inform you if they see you're interested).