Best malls for shopping in Hong Kong are the following:
Pacific Place - Located in Central/Mid-levels. A 3 floor mall which includes mostly high-end stores. This mall is popular among travellers, though it's not very comprehensive for fashion shopping. It has an AMC cinema and a variety of restaurants, and you can try different Chinese and south-east Asian cuisines there. Has various stores for all ages. Great way to spend a day! The MTR (local subway train) runs through it for an easy access.
Sogo - Located in Causeway Bay on one of the busiest streets. It is a 10-floor mall which consists of both high-end and low-end stores. Each floor is designated for a category. The ground floor mosty handbags/cosmetics (from stores like coach, estee lauder, nine west, max factor, prada, burberry, etc). The 2nd, 3rd and 4th are designated to women, men and children (stores including Tommy, Calvin Klein, Armani, Levi's, Disney and some Japanese and local brands). The 5th floor is for crystal and houseware. The 6th floor is a display of current events going on in Hong Kong. 7th and 8th is designated for bedding and furniture. The 9th floor changes approx. every 2 weeks depending on a fair or current occasion (e.g. it will have strictly coat/jackets during winter or swimwear during summer). and lastly the 10th floor holds electronical devices. The 12th floor is usually open for warehouse clearance. The MTR (local subway train) runs through it for an easy access.
Times Square - Located in Causeway Bay. Another one of the most visited malls. It consists of 9 floors filled with mid-range stores like bebe, Marks & Spencer, Nike and many more. The MTR (local subway train) runs through it for an easy access.
Windsor Place - Located in Causeway Bay across from Victoria Park. Has a cinema within it, and has a Toys'r'us store and an HMV (music/CD) store. The mall includes a number of stores selling children's clothing.
New Town Plaza - Located in Shatin in the New Territories. Newly renovated, it now has low-end, mid-range and high-end stores. Very good for shopping, and the different phases of the mall means there's always more to explore. Two big Japanese supermarkets can be found here: Citysuper and Seiyu. Houses a UA cinema. New Town Plaza is connected to the KCR railway (Shatin station).
Hong Kong is an excellent place to buy made-to-measure clothing. One of the legacies of the British system is a legion of skilled tailors, and inexpensive labour across the border in Shenzhen means you can get London-quality suits at Chinese prices. Still, you need a recommendation of a good tailor, as there are some fly-by-night outfits. Ask your hotel concierge or a local businessperson. Prices are on average about HK$280 for a cotton dress shirt and HK$2000-4000 for a fine wool suit depending on the quality of the fabric.
Citygate Outlets - Located in Tung Chung (MTR Tung Chung Station), Lantau. It is Hong Kong's only outlet mall that features over 50 international brand names offering year round 30 - 70% discount. Brands available are Adidias, Calvin Klein Underwear, Columbia, Esprit, Laura Ashley, Last Call (Pearly Gates & Callaway), Nike, Timberland, just to name a few. Close to the Hong Kong International airport, linked to Novotel Citygate Hong Kong and adjacent to Ngong Ping 360 cable car that links the Gianta Buddha, Citygate Outlets is the alternative bargain shopping experience in Hong Kong.

