I use this jacket for cool weather (0+10C, around 30-50F) and it is keeping me warm. It's totally waterproof, ample pockets, packs nicely, is styled for street wear and is super light. In fact, it's so light that I found there is no good pocket in this jacket to carry a wallet - my wallet is too heavy for such a light jacket, I can feel how it pulls one side of the jacket down. I'm 511 (180cm) and about 180lbs (82kg), ordered Large size as per Marmot's size chart and found it more than comfortable. It offers plenty of room for layers underneath for colder climate. Since we don't have much colder weather here in Australia, I don't need to put multiple layers under the jacket, so I could've got a Medium without feeling tight, I have a feeing it would've accommodated for one extra layer, but sending it back was not worth the trouble. Bad sides - I would've preferred more pockets for iPod. Also mesh pocket inside is not zipped hence as stuff will pop out of it as soon as you bend. Not a good place for a wallet or a phone. Overall - very happy with my Trient.
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