The best part of using this software is that you can print 3d models in only few minutes, even if they are complex ones like car parts or medical devices! It's not so easy to use for people who do no have much experience with CAD programs but it has all what I need at first sight (printing).
And also there isn't any other solution out-of box which allows me printing almost anything without modifications/modifications - just drag & drop your file into an empty window where everything will be printed automatically according my settings :) You don´t really loose time when learning how things work as well because we usually know already most functions from basic versions anyway :P There aren’ t many cons about vesalus although sometimes i get some problems while importing files through USB port; those could probably fix though by adjusting system parameters etc., nothing serious tho.