I have shopped 2 times now from aliexpress.com. My 2 experiences were both totally inferior counterfeit products improperly sized and shaped. Their purchase protection is total bull crap. I have spent a ton of time and energy to try to get my money back, but ultimately it's just a loss.
Forget about saving a couple of dollars, it won't happen, you'll spend your money, get a crappy product that won't work, you'll be stuck with the product, and have to buy another one in the US, so you end up spending double the money. Aliexpress is not worth it. If there is something you are looking to buy, you are far better off finding it in the United States. Dealing with these people/vendors from China was a horrible experience and I have decided not avoid them all together... I guess I should be thankful for this experience: I was going to purchase about $8,000 worth of solar panels from alibaba.com. Better off losing a small amount of money than $8,000!
The first time I bought polo shirts, it took about 30 days to get a product that is WAY to small to use, the 2nd time I bought "trendy tops", again WAY to small to use, they will not even work for my 7 year old daughter. From now I on, I will stick with Amazon.com.