I have been using Ali Express for about two years now: Watch out!
Clothing and any thing that fits on the human body will be too small for North Americans. My XXXL bike jacket fit my Medium son. Not even his girlfriend could get her hands in the bike gloves.
I usually order on November 11 for Christmas delivery. This year (2016) the items appear to take more than two months or not arrive at all
I bought LED bulbs that did not work. The seller insisted that I return them. The shipping by Canada Post was more than double the cost of the item.
Their settlement system takes way too long.
The items I buy are usually available on Amazon or one of those daily deal internet sites for about the same money only they arrive in a week or two.