I picked up a optioned out car off the lot (it was the only 335 sport line they had) and it came with the blind/shades. You can't really tell they're there unless you've got them open. Kids in the back seat will tend to play with them (I have nephews).
Honestly, I rarely use the electric one for the back glass (because I forget I have it), but it is pretty cool and helpful.
Long story short, I got tint even though I have the shades. Take that how you want...