I liked the interface. It was simple and I was able to add my inbox very easily. If you are looking for a reliable tool to warm up your email, this might be a good option.

THE ONLY ISSUE IS (considering warmy.io) offered 200 outgoing emails per day from one inbox in their lifetime deal... 40 outgoing emails per day by MailWarm is falling short of my expectations. I would expect this cap to be raised for Sumolings!