We live near an interstate and purchased two acoustic indows to significantly reduce the amount of noise transmitted into our son's bedroom at night. The process of measuring and installing the windows was straight forward - no issues for us. The net effect of adding the indows is a reduction in noise, although we had hoped for a more significant change. We are generally pleased and offer 4 stars. I would say this design is case specific so I recommend describing the exact noises before committing to evaluate whether these are a good investment or not.