For the money it's a good product and investment if you like your Maglite and ...
931052
For the money it's a good product and investment if you like your Maglite and want to improve it. Definite upgrade. Cheaper then replacing it.
2670809
I have had a mini mag lite for some time, my dad bought it for me before I went off to summer camp quite a while back. I recently found it again and was disappointed that it was not nearly as bright as I remember especially when compared to my new LED minimag I wanted to keep it but seldom used it since the bulb burned out and I didn't want to replace it. enter the terre lux upgrade the light is now as bright as the store bought model but with a much wider light spread. I don't recommend buying an incandescent minimag and upgrading it but if you have one laying around or pick one up for cheap this is definitely a great idea.
2612000
This is a good flashlight for the money. If you use an Alkaline battery, the light will still be bright enough to put a mag light to shame, however it will not be 300lm. The light is small enough to conceal and light enough to lose often.
4611735
Good flashlight for the money it can take some damage it is strong battery charges weird sometimes flashlight take apart and put together is easy and somewhat waterproof
2337281
Very nice like for the price planning on buying a few more long run time on I think it's equivalent 2 Maglite or possibly a little better way to go Ridgid
2882129
This item is a useful, inexpensive addition to my smaller-profile (i.e. Mag-lites) flashlights.
360811
I recently upgraded two Mini MagLites, both AA size. The first I got a cheap NiteIze 3-bulb LED from a retail store. The NiteIze product works OK, but the LEDs are vulnerably perched on wires atop the chip, skewed at uneven angles, and those LEDs produce a clinical icy white/blue light. The second upgrade was this purchase - the Terralux TLE-20 kit. Since the LED is embedded on the chip, it is physically a more durable form factor. The TLE produces a softer white/yellow light which appears a tad dimmer than the competing product, but I found the TLE much more pleasing to the eye.

I considered just ordering a new AA LED Maglite, but I already owned a perfectly good housing (incandescent) and prefer to reuse what I already have. In the $10-$20 price range, the variations in price are unimportant compared with your personal preferences.

After reviewing the AA LED Maglite on the manufacturer's website, I assume their product has a superior reflector geometry. Why else would they make the LED version of their product so much larger/longer than the incandescent version. I assume the longer OEM reflector/housing does a better job of collimating the LED light source. But again, I preferred to retrofit what I had.

Intended usage is around the house or in the car or roadside in a pinch. I don't give a darn how far the beam reaches. I just want something bright that stretches my battery life much longer than incandescent. One might choose a higher wattage LED upgrade kit, but keep in mind the battery life will be cut down. I'm satisfied with the TLE-20 kit and would do it again if I had another AA Maglite to upgrade...
4165231
Product works just fine. Very sturdy and not cheap. Should hold up for years with decent usage. 4cm seems to be an over-exaggeration on the largest diameter this thing can support. I'd say 3cm MAX if you still want to be able to close it with the screw. Overall, I recommend over purchasing this and a ultra bright maglite (with included rubber filler).
382878
its a quality build, great size in your hand if you have a handful of other stuff, easy to store in a glove box, back pack, etc...
however, the primary reason i got this was for the lumens, it's definitely NOT 300 lumens (maybe about 150 at best).  I have several other flashlights that were definitely more expensive $20-$50 but the lumens were much stronger.
I compared it to a Bushnell that i have with 250 lumens and is a bout the same size.  In short, the Bushnell was maybe 2x as bright which is why i'm saying it's about 150 lumens give or take.
I would buy cuz it's quality built and affordably priced but if you need basically an LED type brightness that will light the world, this is not it. But good for in a pinch and in your car.  otherwise if your a lumen junky then this is not the light to buy.
4181742
MagLite makes a flashlight that could easily become a family heirloom. This light is lighter than my older MagLite (which I replaced the bulb with an LED). The one word that comes to mind when speaking about MagLite is dependable. I have other tactical lights but I still reach to my MagLite first when I need light.
142432
As other reviewers state, I don't believe this is a 1,000 lumen flashlight and thought going into it that a 400 lumen flashlight for the price was a very good purchase.  There are too many modes to cycle through.  I would prefer a high and low beam as I cant think of when I have ever needed a strobe - unless it was to dance at some sort of club 20 years ago.  The battery does not fit well in the housing and as a result, it jiggles and the light is intermittent.  So long as you don't jostle the flashlight, its a very good and powerful back up light that I keep by the back stairs.
3128080
I must preface with my review being based on a purchase price of twenty bucks.  If I had bought this at the thirteen-ish dollars I see it listed for now, I would give it 5 stars as that is a good value.

I like this flashlight because it feels like a mini Mag Lite.  It is solid, made of aluminum, and has a nice, knurled body.  The light is nothing special - just a typical LED light you would find in a store.  It's not going to temporarily blind anyone in the dark of night.  It provides a whitish blue light that is not offensive.  You can probably get something similar for cheaper, but it will not have the solid feel this does.  I like this flashlight for the high quality feel alone.  The light works fine.  I've had mine for 2 years now.

One small drawback, there is no picture of the battery orientation (except in the included "manual"), so when I change batteries I have to dig up the manual or guess at the orientation.
4405444
It is bright and replaces the bright Maglite which was wrecked by leaking batteries.  I didn't need the options for flashing etc. just needed a good off and on with a bright light.
3232189
Good flashlight but not as good as the FEIT model that some people are saying it is the same as.
2280532
I purchased two of these for use around the house.  Considering the price, these are good little flashlights.  Sure, you could spend more and buy a Maglite and get a beam that is adjustable, etc.  However, for a decently bright and inexpensive flashlight, these were a good purchase.  The head of the light unscrews and exposes the cartridge that holds 3 AA batteries.  Pretty easy to load and is quite light to carry around.  It is not however one of those small, clip on your key ring lights.  It's a bit over 6" long.  If you're looking for a basic flashlight to keep in the cupboard, I recommend it.
4272570
Let me start by saying that I like this light, however it could be a whole lot better. While there are a lot of things Surefire got right, they could have done a slightly better job and maybe some things to think about. Recommend this light somewhat because it works and it will keep on working, just be aware of it's ups and downs.

Pros:
-Very rugged and durable machined aluminum
-Water proofed by two O-rings (have been tested by being submerged in a bucket of water for 30 minutes while lit and worked before, during and after the test just the same)
-Good and secure grip. Nice solid click switch for constant on, and a great momentary press switch. I really like the momentary switch on flashlights. They are great when you don't want to have the light on for an extended amount of time, and to me it's not cumbersome to hold the button down as it feels good in my hands and actually prefer it unless I'll be having it lit on for a long time.
-Good Utility/Home(defense) lighter. I like the lighter more for a utilitarian use and around home. The front bezel is spiked and advertised as a strike tool I'm sure it would do serious damage if you were to strike someone. I personally use it around the house for various needs and stand it on it's bezel for storage. Not sure if it will be my primary tool for defense but I guess it is a nice feature to just have.
-LED will realistically never burn out on you. They have a burn time of tens of thousands of hours and it's not likely one would have it lit for so long even over years and years of intense use.

Cons:
-Only 80 Lumens maximum output. While this might be enough to even temporarily blind a person momentarily and enough for most general use, competitors flashlights are putting out upwards of 200 Lumens for the same price.
-No light mods. This light is only on or off. 0 or 80 Lumens. Again, it's a nice simple flashlight that's rugged and works well, but competitors have brightness mode settings plus other modes such as Strobe, Beacon, and SOS for the SAME price and even less.

I have other flashlights which DO have modes and put out much much more light, however I do like the simple one mode light with momentary switch capability (as most flashlights with modes do not have that option) so that's my reason for getting it. It's good. It's sturdy. And I recommend it. Just be aware so you are no disappointed. I knew what I was getting into, however I will take off a star just for the light output underperformance compared to it's competitors. For the price I think Surefire should have done slightly better.
2909234
It's a good flashlight, yeah?  But it's not going impress anyone, including yourself.

For $12 I'm happy.  Charges with either cord supplied, works nice as a flashlight.  It won't impress you if you've been using LED flashlights for awhile, but then it's way better than six cell MagLites I paid way more.  How much you like it depends on your expectations.

It's a nice glove box flashlight, but really nothing more.