I tinted my car twice with coolworld. First at sri damansara, 2nd at Damansara utama. Both oso quite disappointed.
1st coz it is abt rm500.00 low range... within a year appear bubbles for rear window.     
2nd higher range rm1400 wif discount 50% + claim warranty. Have to go 2nd time to retint the passenger window. 
I notice both of the workmanship not that good. Coz both oso appeared tiny bubbles... with dirt trap in it.   
But so far it is too early to comment on the 2nd job coz it only 3months. But one thing for sure, my rear window got watermark coz they didnt clean it properly when tear out the 1st film before retint.
However, i would like to give the shop owner (DU), mr wong some credit coz he is professional in handling my complaint... 

Megaton, as for workmanship...see ur luck lor 
but the reason they gave for the bubbling is it is low range product. That's y got this problem. If higher range, u wont encounter this problem. The heat rejection i'm not sure how much but i remember, it doesnt go up to 80%. If not mistaken is abt 60%++.
Thus, i can feel the difference for the 2nd tint...car is more cooler compare to previous tint... btw, car black colour, damn hot wor