We use the Netsuite Connector for all of our Netsuite integrations for Shopify, Shipstation, and Amazon Seller Central. The app has worked well and is easy to use. Volume of transactions has not been an issue. The shortfall from 5 stars would be the inability to edit some back-end logic and connection without having to reach out to support. Would be awesome as well if the Amazon Settlement reports were summarized for each period for easy Audit and error true up. Otherwise, this fits our needs well.