IRCTC is majorly used by the people to book train tickets at their own convinience without the need to go to the reservation counter.
IRCTC is very secure with respect to login and maintains a session so that important data of the booking is not lost in the middle of the ongoing transactions.We just need to put in the from and to details with the date and you get to select the trains, see their routes, see their fares and their current reservation status.
I have used this site many times to book an e-ticket at the convinience of my home, just select the tains enter passenger details make online payment and there comes and sms ticket with all the details, paperless method, only a service chare of Rs.22 is availed as the IRCTC fees which is not an issue as lots of time in saved by booking online.