I love the simplicity of having all my data organized so easily, no matter how many different platforms I have used on other projects. It's also nice that you can pick different email lists to send to depending on which product you are testing. However, not every list will support "Unsubscribe" functionality correctly for each platform. For example, if someone signs up for one newsletter but then doesn't receive it because it got auto-triggered with their first product, they may be upset about…