You should be using the new Creately Next which is in BETA, as long as you are comfortable with all the features that are available. The Creately Next is completely stable and is production ready. But it lacks important features that may hinder your goal. You can see all the current features in "What are the features that are available right now?" and you also see all the features we are working on in Feature Requests.
If you are not comfortable with the available features in Creately Next, we suggest you use the current Creately. It's only a matter of time before Creately Next will be fully geared for your needs.
We built Creately Next to give you the best of diagram experience there is. We made sure it is better than our current products and far better than other products out there. If we haven't managed to capture your interest now, we are confident we will in the near future.