After almost wearing out a Theta AR from 2000, I wanted something new and went for the Sidewinder SV. I used the Theta mostly for skiing, and decided a skiing specific jacket was right for me. I also went down one size, from large to medium, as the Theta was a bit big at times. The medium fits perfect for me: 6ft 2in, 180lb. At first I thought the arms were a tiny bit short, but I have not thought about this when wearing it. The fit is, as always with Arc'teryx, perfect. Though it has less articulated elbows, the arms never snag. The width is just right and the pockets are where they should be. The pit zips are long, and easy to use. I also like that they have used several different fabrics on different parts of the jacket to put stretch and abrasion resistance where it's needed. I really like that the pockets are on the side, as the Theta made me my chest look big when I had camera in the chest pocket and a beeper underneath. The hood is smaller than on my 2000 Theta, and my huge Giro SST helmet does not fit. No biggie. The curved zipper is very nice to wear as there is just regular fabric in front of my chin, but it does requires a tiny bit of effort to close, as the protective flap needs to be pushed in a little bit. The see-through pocket on the arm works just as well with a Motorola Talkabout as it does with a Garmin GPSMAP 60CS. Or with a lift pass. All in all, I am very happy with this jacket, and I'm sure it will last just as long as the Theta did.