I ordered a sheet for experimentation. it costed me 10.78 USD from Ali Express. I wanted lighter tints than the most commonly available 25% tints in the market. I got 60 cm x 200 cm, 1 no. sheet. The sheet covered only two front windows of my Suzuki Jimny.
The experience is good. its nano ceramic as per description and the lightest one available. it is supposed to get darker in sunlight but doesn't feel that way much. only a slight difference. the sunlight feels cooler. so i guess it is serving its purpose.I am not exactly sure if this is the nano ceramic but the quality is much better. its quite clear than regular tints.
The ceramic tints advertised by one startup in RWP / ISB is very costly. i think its not worth it.