Personally I think Shein is great - you just need to know what to buy. I don't buy leggings or jeans from Shein for example as they always end up too wide on the legs, and the legging material is usually pretty thin and see through. The key part is to read reviews and look at the measurments of the review writers so that you can gauge if they would fit you correctly. The reviews can also be filtered by photographs, a lot of the users upload pictures when they receive the items so you can see if they represent the picture and how they fit. I try to avoid items with no user pictures and save them in my wishlist until somebody else has tried it out. Returns are super simple, I think it's better to have a "haul" on Shein rather than just one or two items as there's always going to be something you don't like, just like any online retailer.