i had my tint installed by an authorized shop with a dedicated air-conditioned tinting room. tints are neat and properly installed. no dust problem.

i agree that tinting up to the edge of the glass is not necessary and may cause a problem in the future. but up to you if you want to do it like that.

it is you're decision if you want to go cheap and have your tint installed on the streets. you get what you pay for.