Customer service of aliexpress is good. They responds to our queries as soon as possible. They are familiar too.Product quality delivered to me was good and the product was also well packed.Their delivery timeliness is not very fast, product almost takes 20-25 days to be delivered to you if import your product in your country.App is good and is very easy to understand & the interace of website also looks neat & simple.Website has got it's trusted members in a very large amount due to their service, but I recommend to buy the products from trusted seller only in aliexpress.