i have 35% front and 20% back. havent had problems yet (knock on wood).
35% is light enough that you can still make out a person through the tint. 20% you can maybe see a silhouette. any darker than 20 you basically cant see through it from the outside unless youre really close
AW/Terra | ZSP | ZPP | ZCW | iDrive | CA
Mods: BC BR coilovers | Blacklines | M-tech rear | dual exhaust | M3 steering wheel | BMW SSK | ZHP shift knob | High-kick CF spoiler | NBT Retrofit
M3 front control arms | M3 rear guide rods | Manzo rear toe and camber links | Monroe rear shock mounts | Varrstoen ES1 19x9.5+20 Front, 19x11+25 rear