The best part of this plugin is that it has everything under one roof so you don't have to go searching for different things like other wordpress platforms do! I wish there were more features but we are working hard at making sure they come soon enough :) There isn’t anything bad about wpmu dev as far as i know except maybe their price tag if your looking into something free or inexpensive just take another look around because its worth every penny even though some people think otherwise!! We love being able to use 1 website rather than having 2 websites which would be very costly in maintenance etc (if not impossible).