I have met some troubles when I tried to specify some precise values in CloudCompare. Indeed, when an input box is associated with a slider (which is for instance the case for scalar fields scaling sliders), we cannot tune the values as precisely as we want hem to be. This may be due to the fact that these values are changed according to the state of the slider instead of the actual value we enter in the box. And as the slider state is constrained by the screen display, it cannot be precise enough for most of applications.
In a more general way, I think it would be a good idea to let the user decide how precise he/she want CloudCompare to be (through the use of a parameters setting window, for instance). We could for instance propose some parameter to define the boxes decimal precision ...