Even the normal built-in template info has been extremely helpful while attempting to diagnose some really, really slow page loads on fairly large systems (49 template loads from disk was a very nasty shock but not exactly a surprise). Same with the easy-to-use DB query overview.
For AJAX the https://github.com/recamshak/django-debug-panel also works, although you need to install the matching chrome extension. (Don't know if it works yet with this new release of django-debug-toolbar).
Be aware that this version of DDT is likely broken if you are using require.js or other AMD loaders. It may even fail in non-AMD environments if you are using jQuery. This appears to be related to DDT now loading its own jQuery in a non-AMD way. For status see:
DDT is great tool. This is one of those things that should be much easier to install into a standard Django install, IMHO. It might not be a battery to include, but it should be a battery that is really, really easy to install.
Sure, pip is easy enough, but you have to know about pip, DDT and set up a requirements.txt file if you want to share it with anyone else. There are LOTS of handy third-party Django tools, but you need to know about them. That's the part that isn't as easy as it should be. It would be nice if Django came with a few "recommended" requirements.txt files that documented the third-party tools.
The Two scoops (awesome Django book) project setup is pretty great, https://github.com/twoscoops/django-twoscoops-project. There's instructions in its readme to use it to start a new project, although some of its features are probably better explained by the book.
Is there really anyone out there who does any Python/Django dev and doesn't use PIP? I'm not sure there's even any tutorials for absolute beginners that don't mention it at least as part of the install process?
[0] https://github.com/orf/django-debug-toolbar-template-timings