I like that it's easy to use, you can search multiple email lists with one click! This is great for those of us who are busy juggling many different things at once in our day jobs while also trying not go nuts from all these emails we have coming into justin soemtimes (and sometimes ALL THE TIME)!! It would be nice if there was an option where they could filter out some spammy/nonrelevant companies when adding new contacts which may make this more useful as well - but i guess their target market isn't likely going over any big data breaches or anything? We've only used Justin since mid last year thoght perhaps its been around longer than then?? Definitely worth looking up though because even without filtering through certain types(ie non marketing related ones),it makes managing your incoming leads easier by grouping them together.