I tried all rest frameworks I could find for both Django and Flask - for me DRF is the cleanest.

The standard html interface for it (and content type handling) are definitely the best of all of them. You can get a very complete api up and running with not much effort.

The documentation is really nice and clear and if you get stuck just take a look at the code - it's very easy to follow. You should look at it anyway, it's nice code to read through.

My only complaint is that it's not built for Flask :)