Apollo Server and Apollo Client are great and immediately added value to our stack and implementation of GraphQL.
Stay clear of Apollo Enterprise, unless your data usage qualifies you for the "team" plan. Enterprise is priced orders of magnitude higher, and might not offer your team any value. (Unless your supporting hundreds of users and dozens of teams)
Experience with the sales team was not great, as they are not really interested in supporting mid tier teams, and can cut access to your enterprise account if you don't upgrade. Recommend leveraging an alternative APM solution unless your org needs enterprise support.