I grabbed the yellow rectangular kit. Installation (first time car modder) was pretty straight forward, i messed up a bunch of times.. just make sure your hands (and the surface of the lights) are clean and you can peel up and attach over and over. I recommend a set of those tools that resemble screw drivers, but have sharpened picks and hooked picks that can be used to lift an edge of the tint if you mess up the placement (dont fully tack it down obviously).
My one slight worry was regarding the physical dimensions - I believe this piece was created slightly smaller in the vertical and horizontal to allow better (easier) placement. I feel like at least a bit of extra vertical length would have been nice because you can slip excess below or above the plastic to ensure you do not have a strip of white light below or above after installation. People look at the lights from above while standing or directly level through a mirror so i recommend placing the tint biased somewhat towards the bottom of the light (instead of directly in the middle with slight gap above and below) to ensure there is no visible trace of white from the bottom.