This is a tremendous device. It takes the "wow!" factor of existing lights-at-the-fingertip devices to a new level. Instead of a glow it produces a sudden and powerful flash of light. It can be used close up and for large audiences as long as not in daylight (not good for buskers or ren faire folks in the open air). Beyond those limitations it performs oh so very well. Although I use it as part of a show on energy conservation it can be used to augment any vanish, production or magical moment. Although billed as an auxiliary device it is powerful enough in the magic it creates to be almost a magic unto itself. Yes, the price is steep but it seems very well made. With one charge I have used it again, again, again,....you get the picture. I haven't pushed it to see how quickly it resets but I can do multiple flashes in just a few seconds....it doesn't seem to need to re-boot after each flash. I bought it for one use but will end up using it in countless performances over the years as it begs for novel uses and experimentation. This is what real magic looks like.