Aliexpress is safe, but you can get scammed at Alibaba.
At Aliexpress, I got an automatic refund when someone tried to scam me and did not send the parcel. I could claim a refund after so and so many days, but I waited to see what would happen if I didn't. Then they refunded me automatically.
The quality from Aliexpress is in general good, but it can be up and down with that as well. I have got many extremely nice items in good quality. I have never ordered anything big and expensive, mostly clothes and other smaller items. As I can remember, the only thing I was not satisfied with was a hooded sweather. It was like made of plastic. I have a winter jacket from Aliexpress that is really nice. It is warm and a great design. I get questions about where I have bought that jacket all the time. It did cost only 300-something norwegian (about 30 pounds).
Clothes are sometimes fake, but they don't tell you. You discover when you open the parcel that the jeans suddenly is from the brand Lee, the sweather from Gucci and so on. The pictures on Aliexpress can be photoshopped to remove the fake brand names. By the way, my fake Lee jeans are the best jeans I have. They have THE best shape, or what it is called. And the quality is good. But it is fake. I don't bother too much about that, but.
You will take little to no risk by buying from Aliexpress, moneywise. But choose products other have left reviews for, so that you know that it is not chairs stuffed with newspapers or something.
I would definately not buy food items or cosmetics from Aliexpress. Nothing for soaping either, other than molds, spoons and things like that. I have seen pure "essential oils" that are clearly as fake as it can be. And they can use toxic chemicals.
Remember, that new items on Ebay is maybe 90% Aliexpress. Most items you find on Ebay, you will also find on Aliexpress. So if you have bought from Ebay, you know what Aliexpress is like. Amazon have Aliexpress items as well, but not in such scale as you find on Ebay.