Interesting, thanks. I read the review as well as the relevant bit on the EDZ website.
I struggled with cheap overtrousers for some time before splashing out on a pair of Berghaus Paclites. The problem was that putting overtrousers on when I was out walking and the rain had started to come down properly could be such a pain. Take my boots off?.. or try to get the overtrousers over them? I'd often not bother, hope the rain would stop, and get soaking wet legs. Or I'd put them on and put up with hot legs when the rain stopped because I didn't want to go through the hassle of getting them off when it might start raining again.
The Paclites weigh a little more than twice the EDZ's 90g, but they're still very light and pack into a small pouch that I always keep in one of my backpack bottle pockets. They're tough and can be used to wade through patches of nettles whatever the weather.
The Paclites aren't perfect, but they've been 100% waterproof. The 3/4-length side zips make them relatively easy to get on and off, and they create very long side vents for when the rain is on-and-off. On hills, they provide windproofing.
Having said all that... what I'd really like is a pair of walking trousers that are as cool and breathable as my usual ones, but totally waterproof too!