You are going to have to tint your back window or it will look real awful. I would not do the front windshield, I had it done on one of my cars about 10 years ago, its cool during the day but visabilty at night suffers.
2001 "MECHAM" Trans Am #3 - 7.0L LS1 600HP
2011 Dodge Challenger R/T - Toxic Orange Pearl
2000 "FIREHAWK" Trans Am #212 - SOLD