Well, I chose this brake kit because of the overall value and so far, I'm impressed. The rotors have a pretty good set of features that ensure great performance. The pads seem like typical ceramics, but they are well crafted. I only use ceramic brakes on my vehicles, so the fact that they're included saved me from having to purchase upgraded pads separately.The installation went great. All parts fit perfectly. After bleeding brake lines and doing a test drive and wear in, I immediately noticed the increased stopping power and performance.I did have an issue with the delivery though. The kit came without the brake hardware in the box. I made a call to customer support, since the description says they were supposed to be included, and they shipped them right away. The guy I spoke with was friendly, helpful and understanding, so no complaints here. Other than having to wait another few days. I purchased 2 weeks before I planned on doing the install, so I was ok with waiting the few days.Its been a couple weeks now and the brakes are still performing well. I've been driving very aggressively and they continue to impress. I definitely give R1 Concepts my seal of approval. Great product, great price, great service.The front rotors and brake pads were a perfect fit and after installing, significantly improved my stopping power while still being pretty silent.The rear rotors did not fit though. The center part (I dont know what its called) pops too far out and wouldn't fit unless i removed the splash guard behind it (which i didn't feel comfortable doing). The new brake pads were also shaped different so its mounting clips were different as well. Not sure if this is because i have the tech & ultimate package since those packages come with the electric power emergency brake.If it weren't for this issue, i would've rated 5 stars all acrosshigh performance!Finally got around to installing this kit and discovered that the brake pads that come with it do not fit the 2015 Sonata! As you can see from the photos the pads that come off the vehicle have vertical rivets while a horizontal rivet mounting Will completely interfere with the caliper. (See photo)When I emailed the vendor they were completely ill-equipped to understand that the rivet mounting has a direct effect on the calipers. Wound up having to go purchase new brake pads from the local auto parts store because these just do not work. Remains to be seen if the rotors will have any issues but they did install cleanly along with the brake hardware.Perfect fit for my Hyundai 2015 Sonata front and back I purchased the whole kit with ceramic padsInstalled myself real easy and they work awesomeWill be back to purchase replacement pads in the future when the time comesThe disks have greater stopping power but I get a small sound now and then when only using them lightly other then that happy with themBrake performance is good but after one month passed I saw brake pad dust on rims. Also, the front brake pad makes noise.I had a local mechanic install these on my car and they are great. They look good through the wheels and the performance is very good as well.