I'll be honest that I have not tried a whole lot of items on the menu. I'm basing my review on 1 visit having ordered Oyakodon. The Oyakodon itself was tasty, but the portion was a little on the small side.
I found their rolls overpriced IMHO, but you might disagree and say: "Well, what did you expect? It's Leaside." Maybe, I'm not going to argue this point. Their rent might be too expensive to afford lower prices or their foot traffic is not enough to afford lower prices. Who knows. If their maki and sushi were $2-$3 cheaper, I think they would hit a sweet spot. I would definitely be more open to coming back.
Overall, I do not claim that my review is representative of your typical experience at Rollian. I like their interior and their maki / sashimi might be very tasty. They just seemed overpriced to me, so I skipped them.
Service was good. No complaints.