We checked out Sushiburri at TIFF, and the lineup + wait was absolutely atrocious. It took forever for them to finish making our sushi burrito, and when we finally bit into it the contents exploded like a piƱata.
We bought a half roll, and if you ever want to try it you should definitely use a fork and dismantle it as much as possible- otherwise the rice will start spilling down on your shirt and end up on the pavement. The eel was barely there- I think we had two bites of unagi before it completely disappeared into our mouths, leaving us with a fat roll of rice and soy sauce.
It's a very short review because the whole experience was disappointing and not worth the wait or the money. I'm usually pretty lenient on restaurants, but I'd really advise you not to waste your time here. Try some other sushi places!