Gotta say as a fellow biker I'm not a fan of tinted front windows. I agree they look good but there's enough riders knocked off by the "sorry mate I didn't see you" brigade, the tint's can't help in this respect. My S3 came with the privacy glass which is very dark on the rear windows only, still think it looks a bit unbalanced with clear fronts, but I couldn't live with myself if I injured someone due to lack of visibility. This time of year it must be a factor when it's dull and dark, even a light 15% tint is still 15% less visibility. Not trying to p**s on your chips, just my two penneth.
Ron