I have a mobile tint guy coming today recommended by my brother that is giving me an awesome deal for Suntek CXP tint all the way around (dark) and then also on the panoramic roof that will be clear-ish, just adding more heat block. My question is, do you tip for such a service? I've never dealt with mobile service, have always taken my cars in to basic tint shops. Anything I should tell him to look out for? Is this particular brand/type good? T.I.A.