EComposer Landing Page Builder

I've used a couple landing page builder apps and this is by far and away the best I've used on Shopify specifically.

I'd like to see some more analytic data that can be used -- specifically some A/B testing and conversion tracking data. It would be awesome to see some features pertaining to experimenting with different price points, layouts, designs, etc. But the usability is fantastic and the customer service is phenomenal. They typically respond within minutes of your request.