I like (don't love) sushi 101 for location and convenience. It beats out the nearby RA in the accessibility column since you don't have to deal with parking on Mill.
101 has a good happy hour and a solid selection of rolls to choose from. It's not too expensive but you get what you pay for. I find it to be somewhat bland at times.
That being said, it's perfect for the college aged to get together with a group friends for some affordable sushi. You can't beat that location if you are living near/on ASU campus.
Go Devils