You need to be aware of the safety issues, as other drivers will not be able to make eye contact with you. That is why it is illegal in most jurisdictions to tint windows ahead of the B-pillar. Your local law enforcement may or may not ticket you for it. If you are ticketed, you often have to remove it and show them that it has been taken off. If you are in an accident, it can be cited as a contributing factor. At the end of the day, it is your vehicle and your decision, but there is a reason it isn't tinted.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue