I carried one for 20 continuous months (along with a backup made by another brand and one that I’ve long carried) in some very contentious circumstances. This model is apparently the simplest in design and functionality of the entire product group. In the application in which I used it exclusively, it functioned each and every time I activated it. If it hasn’t already been done, I will leave it to others to discuss the form, fit, finish, beam quality, colour temperature of the light product output, runtime, etc. as those aspects do not ultimately concern me. It was part of a kit that was prepared for me. I did not know who made it since there was no logo to identify it and I made no effort to ID it since I was extremely busy at that time. I would carry that particular sample since I have proved it to be reliable as I have used it in the application it was designed for; however, I returned it along with the entire contents of that kit to the organization that provided to me.