I've been shopping at AliExpress for a while. I bought books, consumer electronics and a lot of small decor things. The main problem is to find a good seller so check the ratings and reviews. It's wise to know when the main sells are coming and preparing a list of lots you want to buy. This way, you will know for sure what is the real discount. Shipping can be a problem too if you don't like to wait.
Regarding all this, AliExpress is one of the best marketplaces, especially for small cheap goods.