I have been using this website for past 1 years.The reason I use freecharge over another website is its ease of use. Almost every mobile recharge I do from freecharger.
It is very easy to use very simple.You just need to select the type of recharge and fill other info and pay it from your bank acct. via debit, credit, net banking etc. You will also get coupons or you choose coupons of your choice for free will recharging.
You can do many recharges just using your phone or laptop. Your postpaid, prepaid, DTH, Datacard, Electricity, Gas etc. all bills can be recharge or paid very quickly and easily.
Now Freecharge started a Virtual card service which you can use it as your MASTERCARD for all shopping within India.