I've had sushi all over Calgary, and El's fits in a snug catagory between the 'pay-through-the-nose' of Globefish & Towa and the 'fast food' of your mall foodcourt sushi. I say this because inside El's, it's more toward the foodcourt end. The actual sushi though, is top notch.
Some creative rolls here too (ie the Mexican Roll) along with the steadfast traditionals.
There are only a few tables, so coming at an off-time would be recommended.