Review on Find Email Address by Jared Stauder

I use this to validate my list of emails as part in an SEO campaign, so it's very accurate for that purpose! It only takes about half second per address compared with some other services which take much longer (which can be important when you're trying not waste your time).

Can't think what else there really isn’t anything i dislike - just make sure if they don't have free plan then go somewhere like mailchimp or google apps where their plans are cheaper than theirs otherwise u'll lose money at least initially by using them instead. This helps me build up lists quickly without having too many false positives from people who get spammed all day long etc but want something quick rather tha waiting 2-3 weeks until someone actually responds after sending out loads of marketing queries/mails /etc.