In order to save us an extra bassinet we have the Babybay with the shutter grid; retrofitted psc = 1 and the floor rolling. One, I think, sensible solution that makes the Babybay very versatile. Installation of roles is very simple: in the existing holes on the sleeves Babybay be used, even went without a hammer. Then the roles are plugged in - ready! I have the two braked wheels mounted on the back of the BB, I easiest rankomme to this, when the BB is on the bed. The wheels run on laminate / parquet (compared to the "carpet rolls" of our changing table) quiet and soft. The braking effect is on hard ground but is not really convincing! We have therefore still the Yoke mounted around the BB on the night sure to fix the bed. With such small wheels or little contact surface in combination with smooth base and relatively low pressure, the braking effect may not be very ... The wheels themselves are in locked brakes, firmly and move no piece - that's not the problem! But it does not take much force to insert the BB - despite two blocked wheels - to push across the floor. So for the mobile use of BB, the wheels are quite ideal - to keep the vehicle safely on hard ground on the spot, I would not trust them!