Taste: since I'm from LA, I can't help think that the burritos here in Toronto are a bit weird. Still tastes great, but there is no attempt to aim for Mexican or Tex-mex. For instance, there are chopped green scallions and raw bell peppers in the standard burrito. Not conventional at all. Having said that, it still tastes great, and I still ask them to put all the stuff in. hahaha
Portion: I always get a large burrito and for a guy, it does me ok. I also like to take the burrito home and bust out some Tostidos and salsa (because they don't have any tortilla chips?!), so the burrito itself isn't a complete fill.
Price: I think the burrito is overpriced by a few bucks for what it is, but there are no better options in this area, so I'll continue to go to BB.
taste would give them 4 stars, knocked down to 3 stars for price/value.