I have purchased from Temu and haven't been disappointed. But I am cautious in what I buy and read the reviews. I purchased a couple of tops from Amazon and I really liked them. They were basically Tshirts but with a bit more tailoring that brought them up a notch. They came in so many colors and I purchased 3 from Amazon at $28 each.
I wanted to order more and did a google picture search and found the exact same shirts on Temu for $12. They were exactly the same.
Most of the things on Amazon are made in China anyway and if you aren't in a hurry so can often find the same product for half the price on Temu.
I wouldn't buy high end items from them but for casual clothing items, scrub brushes, plastic storage bins, birthday party favors, etc. they offer great prices.
They do spam you with emails so I suggest you use a throw away account or one you use just for these kinds of things. Just do homework and read the measurements etc before buying. For example, most Chinese sizes run small compared to the comparable American size but the reviews will usually give good size insight.