In reply to UKC Gear:
I got it last weekend and had a try the same day.
It's fairly similar to Rab Boreas (which is, to its price, superior!), but as computing scientists say, "on steroids". The offset zipper is definitely a good thing to have (especially if you have a hard shell with asymmetric zip, like Montane Event Aero Pullover). It's probably a little bit more windproof than Boreas and has slightly better fit (I look skinnier with ME Squall on!) with very good arm/cuff design (Boreas is a little bit flappy). Also, it is somewhat shower-resistant and beads the water off (so far!). Meanwhile, Boreas just soaks all the water as it was a sponge.
I had it on for two straight days on and didn't take it off. It's breathable to keep it on while working out and keeps the warmth in and wind out if it gets chillier.
It costs two times more than Rab Boreas, but it's nearly twice better, too. With brighter colors, that was a good purchase!