Have had mine for 3 years or so without any issues. I had a couple of rock chips from the first year of driving sans clear bra which prompted me to get one finally.
$300 is pretty cheap. I paid around $1000 for it with partial hood coverage, complete front wrapped to the front tire well and the side mirrors. Custom pieces had to be cut to cover the painted bumper which I suspect made the cost more expensive, although my installer threw in the door handle cups on the four doors which was a nice touch.
Only regret is not doing it sooner. I plan on getting a clear bra for all my future vehicles.
2008 Acura MDX Tech + PTG - Steel Blue + Taupe - Traded in at 98,000 Miles
2013 Honda Odyssey Touring Elite - Smoky Topaz + Truffle
2016 Range Rover Sport Supercharged Dynamic - Firenze Red + Pimento