I like how easy it is for me, as an end user/consumer (not developer),to manage my list(s) with this software! It's also been helpful that they've added some new features recently including custom domains & campaigns within their platform - which has made things even easier than before!! Nothing really- but if there was something i wished could be done better or more effectively then perhaps it would have improved upon its usefulness overall? The ease at managing your bulk mailings through one place makes everything so much simpler when sending out information via mass emails such newsletters etc.- especially since we're not using other tools / services now either due do cost reasons!