There is no problem with small items, sure.
Even when there is no buyer feedback, Aliexpress seem to enforce a strong quality( again, my only doubt is about bigger amounts, I never tried ).
In case of problems, the sellers tries to offer you pennies first, but if you refuse, they prefer to refund you on your paypal, than loose a dispute as it looks quite detrimental for their business with Aliexpress.
And here the seller makes a good effort to present well the products, and the prices are indeed great.
For instance on some frames, they offer a BB and headset, and ask if you prefer a 30 or 24mm spindle BB. Workswell sent me a useless(in my case) 24mm.
Thanks for sharing.