I am currently using Mailchimp (with Sendfox as a backup), and I've purchased other email systems but found them not reliable or having poor deliverability. Today I purchased the 3rd tier of Blastable. Setting up the domain in the system was fast and easy. I had one hiccup in the set up, which was the system said I wasn't set up to import emails. So, I sent a ticket in (there's a built in ticketing system in the dash), within a few minutes the ticket was assigned and a few minutes later my account was fixed. The responsiveness of support was great. I then transferred a small list from Mailchimp to test it out. The user interface is really easy to use and pleasant to work in. If you've worked with Activecampaign, you know how a poorly designed interface is difficult to navigate. Blastable's interface is great in comparison. I sent out a blast to the small list of 187 people that I imported and watched the metrics for the day. So far, my open rate is 37.43%, which is comparable to the open rate for that same list in Mailchimp. I did see that about 15 emails got returned to me from Yahoo/Aol accounts, but I believe this was just because I didn't wait for the DNS to fully propagate and yahoo turned them away because there was a mismatch. I don't believe this was related to the software. I very easily connected the Blastable system to OptinMonster via Zapier, no problems. Based on my experience so far, I intend to max out the tier and move the rest of my lists over to Blastable saving me a couple hundred dollars a month. Great work so far guys, looking forward to your continued growth!