Using Llumar Crystal 6 for my existing car, so far no issue on GPS and smart tag. Heat rejection, very subjective...acceptable to me might not acceptable to u, vice versa.....objectively, no way u can easily benchmark, all those data I feel it pretty useless, nothing beat u have same model car, park under same hot sun condition, with different tints, then, u access which one can cool faster and within your budget.....but, doubt u can do it.
Even those tint shop with those big spot light or infra light for u to test oso partial tell u the story, your car heat not only from windscreen (major from front and back), but, also roof. No matters how good the tints, the heat rejection, with pro-long under the sun, somehow the heat will goes into cabin, and your car air inside is trapped.
My view, get the one that u willing to spend the max budget. And, pay attention to reputable installer, it will make difference on the workmanship.
Wah....seems the price never increase since 9 years ago

....i think it about the price, but, then, if u manage to contact from your SA, sometimes got further discount one.....or, some car club member can get lower....u just need to pay membership, get to know them, join them teh tarik session bullshit, and trove of knowledge and discount

This price already discounted. Haha. Original price is 2.8k for crystal 6 and 1.5k for HyperGard. Decisions decisions... Might go with HyperGard and try it out. There is warranty for 5 years for that.