Giving 3 stars as I am not sure how it is now that it is a chain.
Back in the day there was the original Burrito Boyz on Peter and then they opened up this one on Adelaide (Burrito's of the gourmet calibre were hard to get in those days).
a) busy packed but has a number system for swift order turn-over (see e)
b) great food for tourists / locals (open late and during lunch hours and after office hours - so a good all round place to pick up a Gourmet Burrito)
c) this place has seats (no parking though)
d) Large burritos's - you could split one for 2 people depending on the "hunger" factor
e) Take your number order your burrito and wait your turn for the finished product
f) not sure how it is now that it is a chain - but the guac is great (costs a bit extra but worth it), the burritos are HUGE, you can choose as much toppings as you desire, fresh made and NOT frozen.
g) price is very good and highly reasonable and value for what you get