EditEngine Bulk Product Editor

So far, so good. It's been great at updating and changing lots of details across my products within standard fields and metafields. The only issue is if you use Rich Text metafields and want to use them as a dynamic information source, the JSON is also copied across - this is, however, an issue elsewhere within Shopify, not just this app.

Quick and easy to pick up, and adequate warning messages if you are going to do something more risky, such as delete variants.

Support has been quick and helpful so far.