Yeah I find the springs great. They've been on my car for a year now. They're such a massive improvement on what I had previously (Sport Suspension). Yeah I left the shocks and everything else untouched.
I bought the springs originally for the aesthetics, to lower the car and swallow up the arch gap. Overall ride comfort has improved as there is no longer the pogo effect when going over speed bumps etc and the car stays very flat whilst cornering at speed. With a good set of tyres you could compare it to being on rails, you can push the car harder than with the stock suspension and still feel more in control.
You will notice a slight difference when hitting the pothole though as there isn't as much travel in the spring compared to the stock suspension so it will thud a bit heavier. (Although I guess this might be different if you're coming from S or Sline suspension).
Overall very happy and can only recommend them
I can upload some before and after pictures if you like of the car?