I got this because I was simply tired of wearing fleeces outdoors. It looks so much better (more fit and not blobby), blocks wind better (but not completely), and repels water way better (actually beads on the surface). It isn't as warm as a typical fleece though, I'd say a little bit cooler than a 200 weight. It isn't as soft as a fleece, but found it nice and soft on the inside, and the outside is pleasant to touch as well.
I also tried out the Hyllus fleece jacket and found that warmer, but not much, and didn't like the fit as much. It seemed bulkier and more rigid, and it's much more expensive.
I liked this so much I bought the no hood version as well. I like the no hood chest pocket better, the additional inner pocket, and thicker zipper. There's nothing like snuggling up in a hood though, very cozy.
It seems most of the complaints for this jacket are the versatility. I'd say it's versatile if you use it for what it is, a light jacket. It seems best fit for conditions that are variably chilly / windy / drizzly, but not outright cold. Anytime I head out and it's chilly, I grab this, not my fleece. Good for walking, hiking, casual bike ride, on a sailboat, under a shell, etc.
I really enjoy the jackets, but deduct a star for value (it's pretty expensive), and fit (Arcteryx arm lengths are typically long)