So my wife just bought this.  It’s rained every day since.  So far so good.  I know a few days doesn’t make a solid review, but we’ll see after a few downpours.

Basic technical data:

• GORE-TEX Paclite 2.5L
• 75d plain-weave face
• DWR finish (125gsm, 100% polyester)
• Two-way armpit zip vents
• Weight : 350 g (12.3 oz)

It fits nicely over her Mountain Hardwear StretchDown DS jack.