The Braun Series 7 Shaver 720s-4 is part of the Electric razors test program at Consumer Reports. In our lab tests, Electric razors models like the Series 7 Shaver 720s-4 are rated on multiple criteria, such as those listed below. Shaving: Shaving is based on assessments of closeness of shave and ease of shaving difficult areas. Cleaning: Cleaning refers to the ease of cleaning the device. Noise: Noise is the users’ judgement of the annoyance of a model’s sound.