It's simple and intuitive interface for anyone who has little knowledge about mail validation. I don't like its subscription model but it offers free trial account so you should give it a try. Mail verification, correction, hygiene are main benefits of this product. We use this tool as our primary source of address data for all campaigns we run. And we've seen increase in open rate. I like how easy it was for me as well my team of marketers at work when we started using this product! It has helped us cut down our bounce rate drastically since implementing in all campaigns across multiple platforms such as Facebook ads & emails - even with sending out bulk messages via Mailchimp or AWeber (which are both great products). We now have more qualified leads coming through from different channels than ever before thanks so much!!