VSTS looking for feedback on others using this for project control and source code management

davmac1

My group recently switched to this software which is the cloud version of MS's Visual Studio Team Foundation Server.
While there are a very few books on TFS, I have found nothing on VSTS.
TFS lets you connect to it with SQL Server. VSTS only has a limited internal query.
It seems like an unstructured mess to me, so I hope I am wrong, and someone can give me the table structure and how to access it.

Currently we have projects with tasks - multiple child tasks per parent task - the parent has the development spec and the children are the development, testing, bug fixing, original document specification. The changeset is linked to the development task - I guess bug tasks get changesets too.

Looking for feedback and hints from others using VSTS.