Quality is good, and they ride nice so far. My only complaint would have to be the lack of instructions and labeling. Labeling such as FR (front right) and so on would have made the install more straightforward. And instructions for the rear spring setup would have been helpful. I tried installing them multiple ways until finally realizing that the spring perch replaces the factory spring cup. I was also unable to adjust the rear springs without the perch spinning, so I ended up drilling a small 1/8 inch hole through them and into the frame of the car. Using some self etching primer and one rivit was enough to keep it from spinning and made my life much easier! Overall very happy though, and these are small complaints that I wouldn’t expect any other companies to offer such as the four sets of BC coils I have purchased!