The best part of sanity was how easy it made creating our own website design templates for my team members using their pre-built HTML/CSS layouts in mind! They also have responsive template designs which make them great at building websites with mobile friendly features first (which I love).
It's not much but sometimes you need an extra hand or two when working solo so this helps me out quite often too. Sometimes they are slow about updating things like CSS files etc., however if there isn't anything wrong then nothing really needs fixing until after launch date anyway haha. If your looking into designing webpages quickly without having any coding knowledge; definitely give insanity a try because all we do now is just simply drag & drop images onto pages from insane!!