Watch body is well built and looks really sharp. Chronograph buttons don't function and subdials on the watch are not functional (as you'd expect from a watch at this price.) The band is lightweight metal and feels cheap although it looks good visually. It's a good purchase if you like the look of the watch.
Light is well built and a nice size for the pocket. I attached a small metal swivel ring on mine instead of the string wriststrap that it comes with and put it on my key ring so that I could have it handy at all times.
Runtime is around 25~30 minutes using a LiIon rechargeable 16340 880mAh cell. The light is very bright (probably puts out around 150-180 lumens or so), but it does get warmish/hot after around 5 minutes of use.
You can probably get a brighter light for the same price at other retailers. I compared it with my 220 lumen Aurora, and this is definitely a bit dimmer. So FP''s 170 lumen rating is probably about right.
Bought 3 of these and ran them through formatting and write/verify tests. All tests passed, so the data seems to be written and read correctly. I''ve had other Chinese drives that would not reliably store data.