Mah Boon Krong was one of my favourite places to shop. It is huge!!
I think that I spent most of my time in Bangkok inside this shopping centre. With eight floors and thousand’s of shops it was really well designed with each level carrying a particular item or line.
For example the first three levels had all the "normal" Thai shops selling clothing, shoes, belts and all types of clothing. Although you need to be fairly small to fit Asian sizes.
On another floor the whole level covers mobile phones, new and second hand with all the accessories. My poor old mobile had been so badly knocked about, I had it rebuilt there with a whole new cover and new LCD screen for less than the cost for someone to even look at it at home.
Level three was great if you don’t want to carry your souvenirs with you when traveling as it had a huge range of carvings, paintings and fake "brand" name clothing aimed at the tourist market. I think it was more expensive than you would find elsewhere.
The centre also contains a huge department store called Tokyu with the most incredible shoes (sorry, my fetish), amongst other items that I have ever seen.
To get here, take the Skytrain to Station W1, on the Silom Line. The Station W1 is connected by a footbridge to Tokyo Department Store, and from there, you can access to MBK Center.