The results speak for themselves. Significant reduction in noise and vibration has been achieved, though at a cost of around £500. However, lack of instructions from the manufacturer did cause us significant headaches. Initially we were not using props and the plywood pad to squash the insulation to make the glue work, so some bits fell off, which was very frustrating. After reading this, if you fit insulation yourself, I hope our experience helps you get it right first time.