We heavily rely on those components and are using them successfully every single day :)
My only suggestion would be defining SOQL to select only particular fields. Don't start with extracting all fields, because then you'll be lazy to change it and will have problems once someone removes any field from the object (usually by adding and then removing some Salesforce extensions). Trust me, I've been there :)
One important note - Keboola is responsible for the components now and our PS team created new extractor (which is almost identical from the UI/UX point of view):
I need to ask @David Esner34 to add info about publishing this component.