I've been coming to this Mucho Burrito location for fast and healthy take out for over six months now, and this place has become one of my top five go-to restaurants for meals when I am too tired to prepare something for myself at home. As far as take-out Mexican meals go, I find that this is one of the better places to visit in North Whitby as the ingredients this location uses are fresh and well prepared in comparison to other chains like Jimmy Guacos where the salads look tired and wilted.
If you're eating in, you'll enjoy the many TVs set up that are usually playing a sporting game or two (I watched one of the world cup games here) and seating is wide enough to accommodate families and anyone with any accessibility needs. Service from staff is hit and miss. I've had great interactions with the younger staff that are cheerful and always up for a chat as they prepare my meal, whereas some of the older staff can be a lot colder towards customers and not as helpful with choosing menu items.
As far as their sweets go, it is as another commenter has mentioned here - most of the times its stale and the Mexican brownie recipe varies widely from one day to the next. One week that I visited the brownie had so much chilli added that I noticed it (I usually order spicy dishes to give you an idea of the level of spiciness) and on another day that I visited I noticed there was no chilli in the recipe at all.
I am giving this restaurant a 3/5 because while it was my favourite place to visit for a while, stingy management has had a big effect on their food as of late. Staff are noticeably light handed on serving ingredients in any of the meals (watch for this as you are getting served) and the brownies are nowhere near the same portion size as they were two months ago. You'd be lucky to get a 1" x 1" square compared to the 3" x 2" that they used to serve. Go for the fresh ingredients, but beware the smaller than average portion sizes.