Ah brakes. Having the power to stop. I think this will be the next automotive feat, now that smaller cars can't get much more powerful now that manufacturers are trying to find ways to lighten them. Motor Trend will soon Advertise "Ferrari vs BMW M3- 60-0 in 99 feet!" The heat is on.
My brakes were good at 33,000kms when I had my tires replaced. I can't recall the amount of pad left, but I'm sure I'll more than likely replace them at 40,000kms like I've done with all my vehicles in the past. It's better knowing that I can install aftermarket (stronger than OEM) rotors and better pads for under $200, total. I've boycotted the dealer where I bought my G6 at for terrible service, and even for their advertised "$79.95/hr" labour rate, I still won't go back. They know they've screwed customers and are trying to lure them back only to get screwed again.
I've had great luck with Monroe premium pads and rotors. I installed a set on the front of my Taurus three years ago, and they still have approx 40% pad left when I checked them last October. I've put 80,000kms on them so far. My Durango I had installed a front set two years ago in the spring, and have driven 78,000kms since then including a couple trips to Florida, PLUS towing the trailers on weekends and they still have 30% pad remaining. I've never had problems with Monroe, so I plan to use them on the G6 when it's time (early summer).
I drive my G6 hard in the city, but using the autostick transmission to aid in engine braking, I rarely use my brakes hard. This might be why they've lasted me. Just don't forget to consider who else drives the car, and if you are the only driver for your brakes to be GONE at 35K kms then you have to look at your driving style; speeding up for red lights, off ramps, etc, as it requires extra braking force that can easily add up. Excessive heat can also play its part and start to warp the rotors, which can wear the pads unevenly leading to early replacement. There are a lot of factors to consider as well as where you live; lots of hills; 300 feet between traffic lights that are always red when you get there, etc.
'11 Ram SXT 4x4 quad cab - 5.7L V8; 128,200kms
'09 Malibu 2Lt 3.6L - 140,000kms purchased 1 March 2019
'06 Pontiac G6 GT - 3.5L V6; 162,000kms (rear ended 15 Feb 2019, and given totalled title by insurance)