I should first say that I dont do online shopping much. In the past three years, I have bought just three items online and they have all been from shopclues.com only.
I have always found them to have the cheapest price compared to other online retailers. With their clue bucks program, it gets cheaper by default. I bought a BSNL Teracomm modem, a FastTrack watch and an adapter for my RO. All have been original branded stuff and all have been working without problems. And they arrived on time.
I have read online that the products they sell on sunday flea market are bogus. I cant comment on that since I havent bought any such stuff.
So overall, I have only positive things to say.