Do people manipulate the extrusion width under the advanced settings of Repetier Host?

Do people manipulate the extrusion width under the advanced settings of Repetier Host?

I’ve played around with it and found that printing at .2mm with a .4mm nozzle at 150-200% looks pretty good IMO. This is part of the Frozen Tiara (found on Thingiverse). I stopped the print cause it was going to be too large, but the finished one at .2mm with 200% extrusion looks a lot better than the .3mm one I’d printed previously.