Look For Tiny Bubbles That Distort Your View
Make sure you check out how clear your view is. Obviously huge bubbles are a no-brainer red flag, but even very, very small bubbles cause distortion. A good tint installer will minimize the risk of bubbles, but if you've used a low-quality tint, they can form as early as six months down the road as the adhesive begins to break down prematurely with window tint installation tools.
.