Probably the best mod possible, because everyone can relate and use it. It's crazy how the manufacture did not think of a great place to put our sunglasses! Now, we have a solution.
Install takes 5 minute, just take the old one out with a T25 bit, and swap it. And, done! You can either tuck or cut the 2 straps as shown.
This will currently only fit BMW E9X. Fits all E9X though.
It will fit most sunglasses, but if you feel as if yours is a large kind, then it may not fit.