Does the job
Used this a few times during a month-long hike. Seems to work well (i.e. it repels water), it's easy to put on, and it's light enough that I didn't mind throwing it in my daypack just in case. I could still grab stuff out of my pack while I was walking without the whole thing falling off, and it was secure enough that I could shove my rain jacket between my pack and cover for easy access and storage during on and off rain showers. I subjected it to the abuse of plane-side checking twice (gentler than normal checked luggage, but still can be a bit rough) and we hiked through some rather brush-filled areas...it held up through all of it. I'm not sure I'd test the durability too much if I didn't have to, but it seems to do well, particularly for being so lightweight.