Not just reels, I ordered many stuff from Ali on weekly basis. My most recent purchase is a smart watch $100 cheaper than Amazon's, and it's exactly the same thing. Ali is like Chinese version of eBay, which means Ali itself doesn't sell anything; it only provides a platform for Chinese sellers. I hate to say this but just like eBay, it has scammers sellers, and Ali has done little to ban them. For example, if you search flash drives/thumb drives, you'll find tons of fake ones claiming to be 18T, 20T capacity, which is unheard of.
Ali reels sellers, on the other hand, seem to be mostly legit, but I'd still use common sense when ordering: if the deal is too good to be true, or the seller has a lower than normal rating, stay away. Reading the comment sections definitely helps as well.