Maybe it is just my good luck, but I have always had a good experience with the UIDAI. Over the last few years, have been moving around, so had to get our (my wife's and my) address changes 3 times. Every time the address change process has been seamless. Ordered Aadhaar PVC all three times and received on time every time. Aadhaar update has taken between 5-20 days and then PVC card has been delivered between 7
-15 days after address updation. Never faced any issue with payment as well.