I have the E450 and I added the brake light kit from Givi and the Admore Lighting LED kit which give running lights and LED brake lights. You can never be too visible on a scooter.
The mount works with no mods to the People S 200, the case does not rattle too much, and it holds a lot of stuff.
If you don't want to go for the light kit, at least get some good reflective tape and install it behind the lens (you pull a few screws on the inside and the red lens assembly comes out). It is not really a reflector, there is just white paper behind the lens. Put some 3M reflective tape back there and it REALLY lights up at night!
I also have the E30, but I always use the E450. And they don't make the LED kit for the E30, I like having the running lights as well as the brake light.