Their older products around the d10 era were built very well even if their electronics were not as reliable, the build quality current year will be about the same as other brands olight,fenix ect.
The products should hold up fine for most uses
Flasaholics blurb is nee old stock look like gen 2 to me with the smaller o ring at the switch end and trit slot on switch.
The unit i got seems legit also with original packaging and plastic card for warranty:)
Heinnie is a gear website that sells all the things,but they have one of the most comprehensive collections of Flashlights that also has a showroom they are internet mainly with the showroom on the side ☺
Heinnie has a showroom open some days of the week i thik they like a message and rough idea of what you are looking for so they can get from stores
Showroom is in wales