Probem: If you zoom in really close trying to fine aject a model in microns of even double digit, as soon as you click and adjustment point ( corner, side, etc ) the boxes that would tell you the cirrect length , are so far away from the view that you have to zoom back out to make the adjustment then finalise it and zoom all the way back in to be able to see if you got it.
I haven't tested if just using keyboard after setting the snap to grid option to the finest possible resoluition or even off.
but this can be frustrating and off putting if you have to z zoom out too far in order to see the numberical box that lets you specify the dimention.