I personally have the old model, the Series 5 530s-4. I tested the 5020s for several days and I found it excellent. Aesthetically, not much change (even positioning of buttons, even mowing grid, connecting same location, etc.). The shaver is the same as me, not better, not worse (the system Flex MotionTec ...?). The neck rest, for this type of razor, a real challenge and it will take them many times, varying the angles and pressure to hope to get a decent result. I have noticed an improvement: it is now possible to block the angle of the section on 5 axis. However, precision trimmer activation is still poorly designed because the normal razor continues to run during this time ... In conclusion, Braun shavers are very effective as soon as one puts the means. The 5 and 7 range is excellent! I highly recommend. Very good value.
