I think all of our malls are ok. When I was younger, my Dad told me people came here to see how well our malls were designed. When we would vacation in the US, we would stop at a mall so my Mom and sisters could shop, and I would walk around with my Dad, who would point out the planning errors.
I actually think Scarborough Town is one of the better examples. You can hit all the stores (except a few at side exits) by walking in a circle, and when you are done you do the same with the second level. Sherway's figure 8 is also simple, and the signage is better than average. That's "user-friendliness" for you. Both are also bright and cheery.
I cannot forgive Square One's design, though. To be fair, it suffers from a sprawling original design. The bottom floor is dark, although the food court is nice. The top floor, as a square, has its bright spots. But try covering the entire mall without backtracking. The top is a square with corners joined, which by itself requires a minimum of extra walking. The lower level, however, doesn't match, as a long, winding corridor with offshoots to anchor stores. Even the bright, spacious addition - my favourite part and the highlight of the mall - is not without faults. The huge Gap store was designed to front only on one side and turn its back on the corridor to the movie theatres, creating a brand new dead spot in the mall.