I had pretty low expectations when I got this jacket - no reviews here, only a few on Patagonia's own site, and recycled insulation. From the pictures here it also looked pretty clunky. Then I tried it on.
This is without a doubt the most versatile jacket I own, and I've never been a huge fan of 3-1 systems because of their propensity to break (zipper issues) or not really serve any purpose very well. What you get with this jacket, however is a perfect hybrid that works equally well in each of the 3 stages and then some.
Shell alone - very sturdy feel, truly waterproof, does a nice job keeping out the wind, and can layer over anything from a button down, to a sweater, to a blazer. Although it doesn't seem purposefully built for the city, it doesn't get a lot better in terms of a commuting jacket across seasons.
Insulation alone - it's not great looking, but is a perfect layer under something a little more technical - a shell or base layer. I tried pairing it up with my Hyllus (fit just right) and was very toasty.
Combo - great for temperature range from about 30 - 40. Below 30 and you'll probably want some more layering, and above 40 and you'll probably want to pull out the insulation.
Considering it does all of the above, getting this on sale is easily one of the best decisions I've made all winter. I couldn't give it 5 stars because a) would love to see Patagonia with other zip-in options (maybe down?) for when it gets colder, and b) the neck (while nice and high and comfy) has trouble closing sometimes.