Ok, the Geosphere Jacket is one of the best gears I have bought so far. Pretty light, protects from wind fairly well and when it rains, you would have to be exposed to if for quite a while before you start feeling some of the water inside. If you are wearing layers, then its not a problem, the few drops would stay there. In other words, I would say its a very good windproof jacket, but not a hardcore waterproof jacket; it protects fairly well from rain.
When hiking (or doing some physical activity), the jacket tends to warm you up fairly well, even to the point of making you sweat in moderate to warmer temperatures. By some, this could be taken as a pro, and by others as a con. I have been at around 40 50 ºF wearing nothing but a t-shirt and this light jacket
pretty comfortable! In warm weather, some might not like their windproof jacket to make them sweat when hiking.
Its a very good item, depending on what use you will give to this jacket. I think its pretty versatile; you can use it in different weather conditions (for my taste, maybe not for exercising in warm weather), light, and good looking. Personally, I love it.