I love that we can set up our campaigns very quickly with this software! The customer service is also great - they are always willing to help you out if there's an issue or question about how something works (or doesn't).
Sometimes it takes awhile for them to respond when someone emails support but overall their responsiveness has been fantastic so far! We have not found anything yet that isn't easy/quick to use once setup correctly. If you're looking into sending bulk email through Zapier integration then definitely give zAirMail a try as well because it makes things even easier by allowing us to send mass amounts of mails at one time without having to open multiple accounts. Bulk mailing large lists of leads via autoresponders.