Softbox for Flash / Speedlight

For me, it's all about the quality of light.

All of these will have a hot spot in the center. If you add an additional diffusion panel, that helps, but cuts down on the light from a relatively not very powerful speedlight.

I think the light would look better from an umbrella bouncing the light back.

I have plenty of softboxes and octobanks, but I use them with my barebulb strobes which fill the softbox and are powerful enough to give me all the light I need despite the diffusion panel.