I had the "clear bra" installed right after I took delivery. My previous car, a BMW really suffered bad from stone chips. I had the BMW for 7 years (silver in color) and it was so bad, it looked like somebody had sprinkled salt on the bumber. My new IS is black and I was determined not to have this happen again. The Lexus dealer contracts this out with a special installer. They installed it on the front bumper, the front 12" edge of the hood and fenders. Plus they put it on the front edge of the mirrors, and even the top part of the rear bumper that is just below the trunk opening. Prices vary, but I have seen figures from $450 to $1,000.
Of course, the cheaper prices usually only do the front bumper and hood.
When you are 6-8 feet away from the car you can't see anything different. Even when you are up close, the light has to be just right to notice the seam of where the plastic ends.
I have had the car 2 months and so far no problems or chips. I've been watching the forums and I have seen a lot of threads complaining about stone chips. So, I recommend this you seriously consider this.
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Interestd in the clear bra also. Has anyone had one put on