Not bad for the price
The attachment clip is not that "universal."  I had to drill it a bit with a denture acrylic bur to fit it to my Surgitel loupe.  Lihtium ion battery is great; very bright and seems to last the whole day.  I really can't figure out why the other "flash lights" are so much more expensive ($900+) than this one.  No complaints for this price.
Rating: 4 stars