Jut grabbed something handy to do a test shot in the Cameron Photobox, in this case a plastic treasure chest for holding game dice.
It does seem to diffuse the light better than the DIY one, and I was able to fire the flash without an issue so I'm happy with the result. The background 'whiteness' is a step up, and it also includes gray, blue and green backgrounds, so that's a plus.
The only issue I can see is that the 50mm was sharp enough to pick up the weave of the fabric background/floor of the box. This is untouched though, so this looks like it would be very easy to clean up in post.