the battery life of this light makes it unusable. I'd say it lasts a good 4 or five hours before it starts to crap out. batteries cost about 3.50 each, so I'm returning this light before I've spent more money on batteries than I did on the light itself.
I bought the Burny because I needed a new front light for my bicycle. The Burny is exactly what I was hoping for, and more. It is tiny, (an ideal size for a bike light in my opinion) and bright, clips onto a pocket/bag, stretches around handlebars, and has red and white light options. I love that you have to click the button twice to turn it on- this thing will NEVER turn on in your pack inadvertently. I'll be bringing it traveling and backpacking, as a backup light. Highly recommended.
Only one thing I don't like- it uses those nickle-sized CR batteries, which are not super-easy to replace. On the other hand, AAA or AA batteries would make it a much bulkier light.
warm, water resistant, great hood. I'm 5'11 and 150 lbs, a medium fits well. leaves enough room for a warmer layer underneath, as well as a thick hat. Stuffs down small for travel. I've had it for about 4 years, the only problem has been the laminate over the cord on the bottom has slowly pulled apart from the inside of the jacket, leaving the pull-cord exposed. not a big deal since I have it pretty taught all the time, but still kinda annoying.
I've hammered these socks into the ground and they still do the job. I've had better though; not as durable or as warm as i want. They wore holes in the bottom faster than I expected.
incredible warmth-to-weight ratio. keep my wrists warm too, since the gloves go about 2 inches past the base of my palm. It's easy to pick things up such as coins and credit cards off tables. They are somewhat delicate, but I have had them for a year or so and they look and feel brand new. I might buy another pair just in case they stop making them. I primarily use them as liner gloves for cold-weather biking, and along with some cheap-o heavier gloves my hands stay toasty.
the top edge of the bottle is a little sharp. I like how the cap can be used as a cup. Definitely keeps beverages hot, maybe not quite as long as they advertise.
stretchy, soft, and pretty packable. sitting up cross-legged at night or in the morning is really nice, as is being able to move one knee and leg without moving the other. draft collar and hood is very soft and well-made. I'm 5'11 and got the long, but probably could've used the regular just fine. no complaints at all about this product.
As with all arc'teryx items it is well made. However, it is not what I want out of a garment. It is somewhat warm yet fairly thin to wear as a single layer. It would layer well under a jacket, but why not just buy a warm under-layer? I returned mine and did just that.