Giant

Love that it opens till midnight. So it is great when you are rushing around the whole weekend and Giant is still open after dinner for you!
Oh ya, free parking totally rocks too. Plus, you have a totally sheltered route to your car no matter which lot you are in. Reminds me lots of those big supermarkets in the US.
and ya, Giant is Cold Storage’s equivalent of Carrefour, and it totally kicked Carrefour’s a** out of Singapore.

This is not called a HYPERMART for no good reasons. It is much bigger than the regular supermarkets, and sells a whole lot of stuffs that other supermarkets do not sell. For instance, there is a dedicated electronics section, where you can find blender, coffee machine, earphones, laptops and even televisions! The brands and range offered is a little limited though. Also, you can get books, DVDs, stationery and sports equipment here as well.
Of course other than these sections, there’s the regular ‘supermarket’ space. It has a lot more stock than the others, since it is such a big place. On good days, there’ll be really fresh produce, but you have to fight with the crowd a little, especially on weekends. When it’s crowded, the store does get a little messy, which is something that I dislike about it. You’d probably enjoy it better during off-​peak periods.
Last but not least, parking is absolutely FREE! So even if you spend a whole day doing grocery shopping at the store, you won’t have to pay a single cent (and since it’s so near Courts Megastore and Ikea, you can drop by there on the same day as well!). If you are taking public transport, there are also FREE shuttle bus services going to Pasir Ris, Bedok and Tampines respectively. Although this location is a little out of the way, with these free services, it is pretty accessible and worth your trip down actually.

GIANT — the place is worthy of it’s name.
Part of the Tampines Retail Park (with neighbours like Courts Megastore and Ikea), Giant is wayyyyy bigger and sells wayyyy more than just a supermarket — it is what one now calls a hypermarket. They’ve got a pretty massive warehousing operation on the ground level, so come prepared for the volume of things you can find here. You might end up buying a little more than you imagined.
Giant has usually been known to be a place for competitively-​priced groceries and household supplies, but with this place, they’ve included some VERY affordable electronics, and even clothing as well. I’ll leave that to your discretion, but it’s really the supermarket sections that interest me anyway.
I come here for the wealth of options (and sometimes volume) when I’m planning for a party. You can pick up some mega packs of disposable cups and plates without burning a hole in your pocket, and once walked (okay drove) away with two cartons of potato chips at a good 20% cheaper than another supermarket! I didn’t eat them all myself, I promise. I end up buying a fair bit of fresh food at pretty decent prices too. Sometimes they get bumper crops from their partner farms in Malaysia, so look out for promotions on fresh produce.