Prior to using this I used Lemlist and Instantly. I set up 12 emails and 5 different campaigns with Mailead and it has been excellent. I utilized their A/B test functionality. To give precise campaign statistics Campaign A - Contacted 393, Opened 250, Replied 14 (4%). Campaign B - Contacted 416, Opened 219, Replied 20 (5%). Campaign C - Contacted 409, Opened 197, Replied 8 (2%), Campaign D - Contacted 286, Opened 155, Replied 21 (8%), Campaign E - Contacted 282, Opened 166, Replied 12 (5%). There are a few minor bugs but support is excellent, they respond immediately and fixes bugs quickly. I really enjoy using Mailead and highly recommend them.