In my opinion it's one of the best UV flashlights out there. It has a really high UV output power and it looks to be a quite well designed. Only drawback is that it doesn't work with standard flat ended 18650 because the springs are only on one side of the battery holder, but this can be easily fixed in two minutes with soldering iron. It's quite heavy (500g+) but that's ok for me. Overall I'd recommend it.