paul h swrote a review of Rab Positron Pro Jacket - Men's on December 26, 2015
Familiarity: I've used it several times
Fit: Runs small
Many great features and nice construction of good materials, but the jacket falls short of 5 stars because of wimpy sleeves. High winds and minus temperatures...my arms get a bit cold. I don't understand why Rab didn't address this for a jacket that is supposed to be the next level up from the Neutrino. It's like they keep adding stuffing to the chest (extreme example of this: Rab's Andes coat) but leave the sleeves skimpy. Now, I know they want good arm mobility for true climbers, but I can't help feel that the stitch-through construction of the sleeves and less fill was driven by value rather than technical motives. Warmer sleeves would still allow good movement with the right geometry.
All that said, I do like the jacket for all but the coldest conditions. Hence 4 stars. The large was too tight on my chest, though I am normally size large in all items. XL worked well.