My floors are concrete. I have to be honest with you and say that I have no practical experience of rubber flooring in stables. I understand a lot of vets use it because it can be easily and hygenically cleaned because it is non porous and non-slip and helps to minimise stable injuries. Of course there is quite a substantial initial outlay and perhaps some unfair scepticisum from 'traditionalists'. Obviously, there is nothing in the wild that equates to rubber matting.
Feedback is always interesting and useful.