Anyone did their front window tints? How much was paid and what %? Was it worth it?
I assume you talking about the driver and passenger side window, and not the windshield.
Tinting the windshield is illegal in all states unless you can get authorization from a doctor (risk of skin cancer, or eye issues, etc). But there are some very light ceramic tint films that can be put on a windshield and not be noticed by the police (about 80 VLT) that do a good job of blocking all UV rays. But if your state requires stickers to be placed on the inside of the windshield for inspections, registration, etc, it is not a good idea.
As already mentioned, tint laws vary wildly by state, so look them up on the internet for your state. If you live in area with fairly intense sunlight, a ceramic 35 VLT or higher (lighter) on the driver and passenger window would be good, but in CA, NY, and some other states the darkest allowed is 70 VLT.
If you go with a dye or charcoal tint film, you are not blocking much UV or solar radiation, and just making your windows darker. Ceramic tint film is the best for blocking solar radiation.