I purchased this software from AppSumo before, and I find it lacking in new features. The tracking function only works when the recipient opens the email in a web client, not in any email app, which is problematic since most people don’t open emails in a web browser. Additionally, a significant drawback is that you cannot delete leads; deleting data only leaves the lead as unknown, making your account cluttered with irrelevant information. Furthermore, the interface feels outdated and hasn't changed in years. For me, it's best to set this aside and use another service.