I like that it's easy for me as an individual user, not having much knowledge of coding languages or programming itself (although learning is always good).
It has some limitations in terms what you can do with your file once uploaded which makes this software less useful if used by larger companies who have more complex needs than just exporting/importing simple spreadsheets! However there are alternatives out their so its worth trying them all before deciding :) We've been using Xlsx2csv since we started our business almost two years ago now but recently had problems when uploading large documents into CSV format - sometimes they would upload fine others wouldn't even get past 1% without crashing!! This was solved quite easily though thanks again xlxs2cvs :D.