Comments about Gitzo Gitzo Four Season Waterproof Hooded Jacket, Extra Large (XL). for Professional Photographers - Black:
I found the jacket pretty comfortable in the whole. There are plenty of pockets but you definitely need to develope a system to remember where you put stuff or you'll be hunting around for awhile trying to find the specific item your looking for.
It is a little warmer than I thought it would be. I thought it would have a removable liner for warmer weather but I haven't sused that out yet. It is marketed as a 4 season jacket but I think summer would be a stretch.
I've only used it a couple of times but overall I do like it a lot. It doesn't look as geeky as the Photo Vests but serves the same purpose. Worked great to carry a few lenses, filters, film (yes I still shoot film) and teleconverter for a hike to shoot Ospreys and a Bald Eagle nest. I didn't feel the need to take my back pack and did just fine with the weight distribution.
Overall - Very happy with it.