I'm not completely an Olight fan-boy, or the most sophisticated Lux-keteer, (shown by my odd love of modern Maglights…) but I will vouch for Olight feeling like you get your money's worth. I have several, M2R Pro Warrior, Perun Mini, Baton 3, i5R eos, Baldr Mini, as well as several i1r 2's that I have on all my keys and give to family members when ever I get a free one with my order.
Things I like:
1. Batteries do last a very long time, for both years of service and light output.
2. The custom batteries are high quality, protected and tuned for the output of the flashlight. Due to several bad experiences with off the shelf li-ions, OEM spec from a credibly manufacturer is the only way I will use them any more. IMO if you are concerned with having to replace a battery in the field, pony up for the OEM battery or get a light that can down grade to alkalines in a pinch. The I5R comes with a li-ion but can take a AA at 1/2 the light output.
3. Build quality and durability are very good. None of my lights have ever malfunctions from a fall, water, or for any other reason.
4. Magnetic charger is fast and reliable and comes in several mounting options.
5. My buddy has personally proven the longevity of his light. He "stranded" himself in Scotland for the last 8 months and only brought his S1R Barton 2 because he thought he was coming home in a month. This has been his only flashlight for every task including hiking, house repair, hunting, automotive and machinery repair, as well as tackling emergencies in inclement weather. Before that it was his EDC for over a year and not handled with kid gloves, and it's even still on the original battery!
6. Customer support, at least through the online chat, is very good. I've had somebody pick up the chat and fix my issues with the website or ordering even after midnight Eastern standard time
7. Everything goes on sale at some point! And after you buy a few flashlights from them you get put on a list to get first access to new products coming out, and you usually get them at sale price before the public gets them at full price. I save this one for last because it's also annoying if you really want to buy some thing and there's no sale going on because you know it's gonna go on sale after you buy it lol.
Things I don't like:
1: light color between flashlights is inconsistent, doesn't usually bother me too much as long as it's not too blue or green. I prefer warmer colors but I'm not a color snob at all (My M2R is almost too green for my taste but I don't notice it after a few minutes of use.
2. While the magnetic chargers work really well, there are several different types that all look the same. 1 amp, 2.2 Amp I think there's even a five amp, and then a special one for the weapon lights with reverse polarity and a reverse polarity magnet to keep it from working with the other flashlights. And they all look the same! You have to read the back of them to know which one it is. For the most part the regular flashlight chargers are interchangeable with each other but it would be nice to have some sort of quick distinguishing mark or color to know what you're picking up in a drawer full of chargers.
3. Certain accessories are constantly out of stock, like extra pocket clips or certain charging accessories. I've actually never had a clip break so I don't need to buy one but I just always see them sold out on the website. You have to get them quickly when they come in stock
That's just my 2¢, take it for what it's worth and ask me any questions you may have!