Good - can be great
Have two originals. Work well and App very handy. But for the work I do - field portraiture - light modifiers are necessary. Lumecube has just made available barndoors and snoots. I have jury-rigged a tiny beauty dish from China. Lumecube - you should customize these and make them available, too.
It's a clip…
Haven't used it yet. Functional design. Quality moderate.
All purpose Backpack clip
This is a really useful accessory that can be used a number of ways, not just on your backpack.
Good not great
Clip is not easy to open and attach. More rotational movement would have helped. Tightening nut does not allow for ease of alignment. Overall it’s a useful tool to have with the Lunecube