We currently pay for the Plus Plan. This app simplifies many things and allows you to update Metafields in bulk, which I'm surprised is not part of Shopify's normal routine. I hope to see a few little things added, such as CTRL & Up/Down arrow working the same as a regular spreadsheet. I have recently had issues with speed. When I reached out, they said they have been a victim of their own success and were in the process of upgrading their servers to support their increased amount of business. I can confirm that speeds are back to how they used to be, which is good. App has a lot of potentials as they grow and tweak things.
This app is awesome for providing my customers with data they need to make informed decisions. The ease with which I can manage and update my metafields is unrivaled to date.