fits comfortably and surprisingly still lights up
357586
My daughter had this for almost  2 years now, she's still using it, fits comfortably and surprisingly still lights up. I would recommend this product.
458353
This armband is beautiful and very bright without being annoying or blinding. I feel much more comfortable walking or jogging with my dog when it is dark out since I have this. I have had similar light up visibility products but this is the only one which shows up well and hasn't fallen off. It can adjust to attach almost anywhere and came with extra batteries. I will be ordering more in different colors.
3870867
Bought this for my 17 yr old niece. Was VERY impressed with the fit and the lights really made it "pop" at night.
4819486
Wow is this little thing bright!  It lit is in a  totally dark room about 11" x 12", and you could see everything in the room, even into the corners.  I took selfie video on my iPhone with it in a pitch dark room, with the light at arm's length same as the phone, and it was well-lit.

It's a bit larger than I expected - about as big around as a nickel - but not too heavy. Even with the battery, it's not heavy to hold it between your lips if you need both hands to work on the thing you're lighting up.

The machining of the tailcap/switch is very smooth.  The mechanism is dead simple: the tailcap has a donut-shaped piece of foam in it.  When you screw the cap down hard enough, the foam compressses, allowing the battery to touch the contact peeking through the hole in the foam donut.  The foam will wear out eventually - they included an extra one just in case.

Overall the fit and finish is excellent, and the design, while simple, is very functional.  It stands up nicely on its tail for use as an electric candle.

I like it a lot, and the price is very favorable.
1218714
Extremely bright and comfortable to wear. I haven't had a chance for long use from it yet but it seems up to task.
3557335
This hat lights up really bright! I bought it mainly because I have a small head and this had a snapback that let you resize it to fit (it fit great with that), but discovered that this also has LED lights that light up the symbol. The display itself is a little seizure inducing, but it's a neat surprise all the same.

Also Decepticons all the way.
3191097
I was skeptical if the light-up function would work when exposed to a lot of sand and water. Luckily, after weeks of time on the beach and in the ocean, these still light up!
1723356
It fits just fine & the color is bright white. The light output could be a bit brighter which is why one star get knocked off.
3365354
I am impressed by the fit of this costume.  I am a size 2 so I ordered the extra small and it fits very nicely.  It is form-fitting but it's stretchy so there is a lot of give.  The picture shows a shiny material, this is not shiny.  It's the typical material of most costumes, polyester and a little spandex.  It's quite comfortable and the slit does not come up quite as high as shown.  The belt is not silver, but an off white with silver accents.  The wig is not as bad as described in most of the reviews I've read, at least not in my case.  It fit just fine and I don't think I have a particularly small head.  I'm quite happy with it overall.
2796057
Soft, fits perfect and really shows up at night with a flashlight.
1366849
Brighter than expected, gives off a nice warm glow
2180170
Fairly comfortable. All the lights worked. Fit well.
3516973
Great for lighting up the dark without being overwhelmed
4095499
Surprisingly sturdy and well-made for the price, lighting options are great.
1258151
Fits perfectly.  Color is subdued and could be more vivid..  Glow-in-the-dark feature works if primed with light source first.
4100423
Fits well and doesnt fall down when wearing it. It's actually surprisingly comfortable and looks awesome.
3424065
looks brighter than the pictures. however, I still love it !  Good quality and really comfortable.