tl;dr
Sofirn is serious about their warranties and is trustworthy for their undying support. I have never had a problem with their support.
SP10S should not have a moonlight/eco mode if you can't access it from off, if you had a SP10B it is a continuation and builds upon its strengths and weaknesses, if the SP10B was 1.0 feels like a 1.5b version. The reversible clip is a very nice addition, but the provided keyring clasp should not be used.
The SP10S was kindly provided by me to Sofirn this year because my SP10B had died (the infamous drop problem) and I informed them about a month ago, they replaced it with no resistance (I sent a video when I reported the problem), and I want to thank them for providing me the flashlight for free, despite me buying it about a year and half ago. I think that this light is a good continuation of the SP10B but did not fix all of its problems, although I believe it is the best AA for the price and is great clipped on a hat, it is lacking again in its driver.
It takes AA and 14500. I don't have any 14500 so I didn't test them. The SP10S starts on low mode, it has no mode memory on AA. It has a good moonlight mode, and there is no way to start it on moonlight mode which they call eco mode. The light is a very nice neutral white due to the Samsung LED. I used it on my hat most of the time it is not too heavy. It is a shame that multi clicks, long clicks or even a mode switch is not an option to allow you to access moonlight mode, because it does not allow you to start it on moonlight mode, because it would make this light perfect. It is a nice AA light that provides me a lot of energy, I usually used a AAA Ti3 clone, a Glaree E03 or Nitefox K3 on the brims of my hat, but they would run out of light and I would need to replace the battery pretty often. This is heavier but not too heavy to attach to your hat.
It was a good flashlight, and I should have kept it on my hat. Unfortunately one day when I had it on my keys, the provided keyring clasp broke, and I cannot find the light. I wanted to warn anyone who is going to use this light to not use it or be careful when using the clasp, because mine broke I decided to write this review, to warn people to not use it. It is really upsetting to me because the SP10S if it had the moonlight from the off would be the perfect EDC, it is SOOOOO CLOSE and if there was a mode to select if it should be on or off would make the perfect compromise.
Pros:
Good AA for hat (would be better if it had a TIR lens because of corona).
Very good battery life, I replaced them before they died.
Excellent color from the LED, it was the nicest, whitest, LED I have used that did not seem to have any tint in it.
Reversible clip (the SP10B is not made to be reversible but it can be done, I am not sure about the sturdiness I just tried it on a dead one because I found out this was reversible).
Cons:
clip may damage hat because of its tightness.
moonlight mode is not able to be used from the off position, you must cycle to get to it. This makes the omission of it beneficial because it is a "dead mode" that cannot be accessed when you need it, and is in the way when you don't need it.
keyring clasp caused me to lose my flashlight. Better QC should be used in order to prevent cases like mine from happening.