Great quality, top notch design and build but sizing can be tricky - Rab Baltoro Alpine Jacket - Mens

First experience with RAB. Quality is top notch. On par with any others I have tried, Marmot, Arcteryx and Patagonia.
Sizing, leaves a little to be desired. I am 6' and 184lbs. The (M) I am keeping allows for a single thin layer to be worn under the coat, but nothing more. Moving up the the (L), creates a situation where the sleeves come down past my palm to my second knuckle. The (L) also allows me to wear the largest jacket I own a 800 series North Face down jacket underneath with room to spare. If not wearing a massive amount under the (L) it looks like I am a little boy wearing his dads suit coat, just plain funny and way too much extra room. Even with a NF Denali jacket under the L I can fold the sides of the jacket over because there is so much extra material.
Very odd that there is such a gap between sizes. Almost as if the (L) I have is actually a XL and was mislabeled. Then again could simply be RAB's sizing.......either way an odd difference between the sizes.

This review was written in the old system and had content requirements that are different than reviews written today.