Appears to be well built with good materials. I'll have to see how they even out over time. You need to replace and insert the speed ring if you want to use other brand flashes.
Pros
The softbox can be used with both flash and constant light sources such as fluorescent lamps or "hot lamps" such as quartz halogen or tungsten lamps. When using softboxes with "hot" lights, the user must ensure that the softbox is rated for the wattage of the light it is connected to to avoid fire.