It’s pretty good but make sure they send proper confirmation. I availed it at Mumbai. They give you entry through gate 1 of the airport which is usually reserved for business and first class passengers. They will have someone waiting with your name on a board. After that they send a porter with you who will carry your bags, check them in and assist you all the way through immigration. No priority was given during immigration checks however. After that they will take you through duty free and then finally will give you a buggy ride to your gate.