This is my favorite CRM if you are looking for a very straight forward, low-tech, and affordable option. I rarely have to contact customer service for help because it is so obvious how to use this platform!
The feature it has for 'Resend to Unopens' is extremely valuable and I can't believe other CRMs rarely have it.
Despite using 7 different CRMs in the past, I like this platform more than any other including the very popular, MailChimp.