I like the zoo.
I buy memberships once in a while so we can take the zoo mobile. The commentators seem to be funnier this year. I just wish they would put the animals facing the zoo mobile rather than empty cages. When I did the African safari at Disney animal kingdom, I thought if only toronto could do something like this...
If your not sure about buying the membership, you can visit and then trade in your admission at anytime the same day for credit for the membership. Check the zoo map they give you because it may also give an extra 10% off.
I just wish they would give guest passes once in a while or maybe offer it at a discount.