I can't honestly give much opinion on function but the sizing would confuse anyone.

According to Gregory website:
Size Volume Weight Dimensions
XS 20-35 L
S 35-60 L
M 60-80 L
L 80-100 L
XL 100-120 L
The label on the one I just received says XS 55-65L. I ordered the XS thinking it would fit a 34L pack. I guess it is a good thing I own a 65L it will fit also.

If I was rating the experience of purchasing with all of the confusion I would give it a 1. The cover looks like it will do a fair job so I gave it 3.

I picked one up about a year ago when the cheap knit cap I was wearing wasn't doing the job. This works great as far as keeping wind out of my ears and allowing my head to breathe. Works well down to around 20 deg Fahrenheit below that I use a MH dome.

If it would just go all the way over my ears it would be a perfect 5

Mine weighs 2.2oz.

Just got this a few days ago and love it for what it is. This not a high end performance shell (like my Marmot Exum Gore-tex 3L pro shell) This is more basic and works well for keeping me dry and comfortable.

I would suggest a double zipper - next to no weight or bulk gained for the added function.

I'm not sure I like the flaps on the pockets. They seem like a place water may gather and potentially leak.

I haven't had very good luck stowing the hood in the collar but maybe I'm not doing it quite right.

Pit zips are always a nice feature and the idea of venting through pockets is nice too.

Easily stows into left pocket also.

This is a great jacket to carry around "just in case" or on less technical activities. I would not even consider it for a week long adventure trekking. I would take it on trips that it may or may not be needed or on shorter journeys where there is little danger if it doesn't perform in extreme conditions.

Actually picked this up on geartrade. Just received it today. Been wearing it around in drizzle and gusting winds and temps in low 40's. So far it blocks wind surprisingly well and sheds water well. It has a nice stretchy feel. Breathes great so far but haven't been doing anything strenuous. I have even left it on indoors at work and haven't been uncomfortable by wearing a jacket indoors.

Update 11/30/11: After wearing this several times I have found the wind resistance less than I thought at first. It breathes amazingly well though. It does feel somewhat stretchy but actually stretches little at all.

Weighed my XXL at 1lb 5.4oz.

You can read my report here http://www.backpackgeartest.org/reviews/Footwear/Boots/Merrell%20Outbound%20Mid%20Boots/Test%20Report%20by%20Roger%20Ault/
My feet kept getting wet and I ended up getting rid of them.

I find this quite warm for the size/weight. It was never meant to be a stand alone winter jacket. It is a great layering piece for insulation and also works well for me as an outer shell as long as precipitation is not a concern. I have washed in Nikwax downproof as recommended by Patagonia and it will shed very light rain and snow but I would not dare try this for extended periods or anything over very light precipitation.
Extremely light and very packable. The reg. $200 price tag stings a little but it is a fair deal at the current $140.

Great construction, solid materials, nice wide hook and loop closure, tough replaceable strap. Overall a little heavy but worth it.
I wear a size 12 boot and I am 6' 275lb. My calf measures 20" and the XXL are nearly too big. I usually tend to go up in size because of my size but I wish I had went with XL on these. If you are borderline or have small legs I would recommend downsizing rather than up because these seem to run large.

Wow this one weighs over 39oz on local postal scale (size xxl) Has a regular fit which allows for layering. I agree fully with the reviews below that this is a heavy jacket and can stand alone. Yet it leaves room for layering on cold windy days.

I haven't been out in the wind yet but it certainly feels like it is highly wind resistant if not windproof.

I bought this one slightly used and washed it right away. The Omni-Shield repelled water well but I washed in Revivex DWR just for good measure.

I wouldn't plan on trying to pack this in my pack because of weight and bulk but it certainly is a nice jacket for when the weather is a little nasty. Windy cool days will be no match for this thing from my first impression. I will update if anything changes.

Very light and 100% waterproof. The cinch takes a little getting used to but works good once I got used to it. A little awkward to pack because after folding the brim it tends to retain creases.Overall another excellent product from MH.

I have only had this jacket a few weeks but have worn it daily. I have been out in temps fgrom -10 to near 40. I have been dry and warm. I was surprised how warm such a thin jacket could be. I would recommend this to anyone who wants waterproof and the warmth of down.