I like how easy this software makes importing our email lists into market place! It's very simple, intuitively designed interface which enables me as an administrator or user who has little experience in marketing automation tools such us Mailchimp etc.,to easily import my list from other sources (Excel files) without having any technical knowledge about programming languages required by those softwares - just drag & drop your file(s). The only thing i dislike atmose are some errors when you try exporting more than one type e mail address but their support team will help fix them up if needed so no worries there :) We use dataloaders mainly because we need bulk upload capability while using different types/lengthy emails addresses per client contact groupings within Marketing Automation platform called "Marketo".