As mentioned previously, minimum is 5 psi (if you have a compressor kit onboard anyway) and it rides like factory. Most of the time I prefer to be around 8-10.
It is definitely weird though when you air up to 30-35. You feel as if the back has risen up so far that you're staring at the ground. In reality, it's not that significant, but when you're used to the feel, it definitely changes it.