go early! IF i do any grocery shopping on the weekend, which i often try to avoid because its so busy and little selection due to it being so busy, we go in the morning before 10am. Theres not many people out to pick over everything yet and you can find some really good deals
i find Sobeys south has the best fresh produce in Brandon, safeway in the corral centre is good too but I've noticed since Safeway+Sobeys joined together, Safeway has less stock and a few less options than Sobeys but it beats Walmart produce in my opinion. Superstore is hit or miss over the winter and almost everything is imported from Mexico.
Sobeys has a lot more local + canadian products. Even theyre cucumbers are green house grown in Canada usually over the winter and taste so much better!