GMAT Strategy

www.4gmat.com

Its a institute which provides coaching for GMAT.

Yes, I have

I think they are based out of India. I have seen their quant study material and I found it to be more aligned to the IIM Cat entrance rather than GMAT. If you are in India they may be a good option.

I haven't heard about them but I know from talking to a colleague whose sister is still in India that some of the big American companies have classes there. I think Princeton Review does...I used Cracking the GMAT for my GMAT prep and he was asking me about them. Pretty sure it was them, anyway. Look at their site (www.princetonreview.com) under the GMAT section.

never heard of them
and if they are based in India, how effectively they can help you get in to top US Business school when these schools are not in India.
May be they are good for Indian business school or if you are in India and need any classes