I have tried indialinks.com for domain name registration. Here is a quick short review of IndiaLinks.com
NB: This is not a review of the web hosting service provided by IndiaLinks.com.
Pricing : As far as i know, indiaLinks provide the cheapest rates for domain name registration in India
Checking domains : Searching for domains is very easy. To buy a domain, visit www.indialinks.com/domains
Support : Good
Alerts : Good. They sent emails and sms for renewing your domain names.
Control Panel : Very easy to use.
Drawbacks : Does not provide whois information of already registered domains. Cannot change the company name through control panel.

It is not drawback, it is major drawback that they do not allow to change organization name.
How many of you really know what legal issues it can draw towards a professional company?
The ICANN documentation clearly says, that the person who registers the domain has to be legally associated with the organization name. The organization name can be seen in whois information, if you plan to change your organization name, and cannot change it to be displayed on whois, then, you better speak to your solicitor about the consequences.
Service of Indialinks is : POOR
VERY VERY POOR. Support guys cannot even write proper english and there is no “please” “thank you” or “sorry” when you call them. When you change NS records, it goes in a queue because, indialinks is a reseller not the real body which can be claimed as domain registrar. NS record change takes more than needed.
Worst service ever!
Keval is right. I had worst experience of it. It takes lot time to change NS record & its a real body as Client have no access to any of the domain management. It takes two-three days for changes. If you want to add/change child name server entries you have provide details to them. No access at all. We cant renew in debit account. Nothing is automated.