Perfect Rain Shell
I've had this jacket for quite some time now. The Beta SL is lightweight, form fitting, lies at the waist (which is exactly what I wanted....no bunching up), and has room for a layer or two underneath. Some things I have come to love: the collar is great, and I really like how it isn't attached to the hood like other rain jackets. The pockets can be unzipped and still be waterproof. It's also more breathable than I thought it would be, wears well underneath my pack, and is easy to care for (just throw it in the wash!).

Great Jacket for the Rain!
I have used this jacket during the rainy season in Tibet where it is also very cold and very wet and I can stand behind it fully as a product. I am 5'9 and 150 and I wear a Medium. The Small also fit but I like a little room for layering and just moving around.

Super Light jacket
This jacket is extremely suitable for simple outdoor activity as it's so light and easy to be compressed and be put into packs. Although it's not tougher than other 3-layer Arc'teryx GoreTex jacket, it has its own advantage.

Light weight, packs easily and totally waterproof
If you are looking for an extremely light weight jacket for hiking or everyday use, this is the jacket for you.

Lightweight
Incredible warmth for its lightweight!