I gave it 4 stars, not perfect, but I like it, it is a solid bit of kit.
I am 6'3", 188 lbs.
I normally wear a large tall, I ordered a large long.
Sleeves and body are a good length.
It is close fitting (more on that later).
When I reach forward with both of my arms the ends of the sleeves do not pull back.
When I reach up the bottom comes up to 4" or so below my belly button.
* I am neither muscular nor fat, I just tried it on over a long sleeve t-shirt and a 250? wt fleece jacket and the Rig Light Jacket was binding around my arms.
I can wear it comfortably over two close fitting base layers and a close fitting fairly heavy shirt. I can feel the jacket but it is not uncomfortable.
* I am not generally a big fan of hoods that tuck into collars but I think the Rig Light design is pretty good. I can't tell if it is entirely waterproof, but it is certainly water resistant. I used it on a couple of chilly and windy days and found it very useful. And easy to roll back up into the collar.
OTOH, the hood cord is about 6" longer than it needs to be on both sides. This is a design decision I just don't understand. It requires just a bit of care to ensure the cord ends don't flop out when you put jacket on, but I don't understand why it is necessary / how it would be useful.
* The pockets are all well sized, they hold a fair bit, and all parts of them are easily reachable. The chest and hand pockets are made with mesh so putting anything in that might snag needs to be done with caution. The arm pockets do not have mesh in them.