I am a long time Rab fan. I beat the fluff out of my previous Rab Microlight Alpine. I think I should have bought another one of those..
This Jacket is of good quality there are few kinks however, that make it not a five star jacket in myopinion.
Let me start with the good first. I like the fit. I am 5.11 , 190lb and got the large. The Mimosa color on the pic is light blue but the jacket is darker blue, which I liked. It was the only color available .... so whatever that.

The face fabric seems durable. It is not heavy for what it's meant to be. I'd totally pack it on tours when weather is in single digits or teens. You can supplement it with a light weight synthetic puff for cold weather as it is not tight.
I like the lofty hood and the metal brim.

The bad:
First thing first! It is noisy. If you want to be in a ninja school and wear this puffy, then this is not for you! It sounds like you are wearing your grandma's couch wrap.
No Outside chest pocket
Side zippered pockets are with large zips hoever the pockets are not deep at all. They end up 1/2 inch after the zip ends. There is more room for pockets further down the jacket, but the designer decided to cut them short. Idk why.
Same goes for the lonely inside pocket.
And a last thing on pockets. I swear I don't have thing for pockets!
It would have been nice to have a stuff it mesh pocket inside.
Ok the last thing on pockets. Why not make it stuff in it's own pocket rather than a separate sack?
Last but not least, didn't buy it on backcountry because I prefer more respectful retailers. But I do like browsing here and reading the reviews then I go to some not trademarked place ...

Looked at the RAB Microlight but it wasn't warm enough for cold winter weather. Then came the RAB Electron--pefect jacket, just what I was looking for. It's very, very warm--typically I just wear a t shirt underneath. Also, it's VERY lightweight and the down is hydrophobic so still retains warmth when wet. Looked at North Face and Arcteryx and found the Electon to be the best out of the bunch. I would highly recommend.

I got this for my husband to replace his old puffy, and he loves it. It is super warm, comfortable, and functional. The zippers are big and work well on his- he'd prefer to have a two-way main zipper, like on my Positron, but not the end of the world. The pockets are nice and big. It packs down well, though it would be really nice if it could stuff into its own pocket rather than having to keep track of a separate stuff sack...
Sizing is true, he takes a M-L top and the L in this is a great fit that still allows a little extra room for a ticker layer.

Good jacket as a backcountry puff.
Packs small for the warmth.
Outside pockets are functional - they open pretty wide so you can store lots
Zipper is fine on mine.
Elastic cuffs on wrists are great and seal in heat.
Zikwax treatment on down is great insurance.

If I were to suggest improvements:
1) add interior mesh "shove- it" pockets for gloves etc.
2) ditch the included stuff sack and make the jacket stuff into one of the pockets

This is a warm jacket. The front zipper? Well, my daughter's Barbies' have better zippers. The zippers are cheap and cranky. The front zipper is difficult to work when your hands are warm. When they're cold? Good luck. I like the fit and unlike some of my Rab down clothes, the down in this jacket is significantly better and therefore warmer. Not all down is created equal (or zippers)!

重庆的天气比较阴冷潮湿，估计和英国类似，所以选择了RAB。很暖和，比较轻，小号的对我来说刚刚好。很喜欢！

Very nice, very warm, I'm 5'10' 170 lbs and the large fits me just fine, has a left hand zipper though, need to get use to that but other wise a very nice coat

This coat is very warm. It is not Michelin Man bulky, but it is definitely warmer than the popular micro-puffys like the Ghost Whisperer. Great weight to warmth ratio. Shell material feels very durable but is a bit noisy. Fit is on the slim side, it would be hard to layer much under it unless you size up. Sleeves taper quite a bit, but the cut still gives good range of motion. I have longer than average arms, 6 ft. 175 pounds and the medium fits me well. Love the elastic cuffs and the big pocket zips. The hood is kinda weird, it is oversized to be helmet compatible but this ends up being annoying for general use. The elastic band around the hood is sewn through the neck of the jacket, kind of a weird design, we will see how that wears. Overall a well thought out insulation piece with features biased toward technical ascents and the like more so than bumming around town.