WinCo is my favorite place to shop. The atmosphere is chill-everyone minds their own business, and the staff is friendly and non-judgy. I love that it's open 24/7, so I can shop whenever I want. They have a great selection, especially in the frozen foods section and the deli, which offers good quality at really fair prices.
The produce section is fairly large, and I can always find collard greens, which I love. They have a small organic section, which is nice for specific options.
Another great place for specific options is the bulk bins. They're amazing for finding things like vital wheat gluten and high-quality baker's flour, which is hard to find elsewhere. The bins also have cereal, candy, pastas, and even dog treats and bones.
My only gripes are that the area can be pretty shady, and while there is sometimes security out front, it's something to be aware of. Also, if you are shopping late at night, the aisles can get pretty clogged with boxes as the stockers are stocking, and you'll have to slalom around them. I wish they carried some specific name-brand products like Crystal Geyser, but, overall, I am able to get everything I need there.
The store is usually clean inside, even late at night, and I feel pretty safe shopping there. A great variety, affordable prices, and a nice shopping experience overall.