Shopping in KL is great and cheaper in some areas compared to Hanoi. I love shopping in shopping centres and in local markets because I can see the difference in the prices and the quality as well.
I went to one of the local markets called Central Market and actually loved it. I feel shopping here is very easy and I can play bargaining games as well :). I was really lucky that I found a clearance shop and they sold all their things with a fantastic discount and I of course spent lots of time (and money!) there. I bought quite a few items like masks and wall hangings from them and I am very happy with the quality as well. I also stopped at an Indian shop called Little Kashmir which sells stuff made in Kashmir and other parts of India. This is a great shop with all beautiful hand-made stuff reasonably priced. I feel regret now because I should have bought another wall hanging or another blanket. Their stuff is carefully made with so much detail. Check this shop out if you have a chance.
Shopping centers in KL look like other shopping centers around the world but they are all located in huge tall buildings. The difference is that they have a variety of stuff at great prices and the salespeople are really friendly. Clothes and cosmetics are cheaper and better quality than some other countries and I've also seen many Vietnamese in those shopping centers. I talked to some of them and they also feel a bit cold walking around these places, with the airconditioning turned down really low? Shopping in Malaysia is a very pleasant and cheap experience.