I've only used my driducks for one trip, 4 days, two of it raining all day. I have a Westcomb Spectre eVent (10.9 oz, small), that I originally bought for snowboarding.
I was very surprised at how much I liked the driducks. I honestly didn't notice a difference in breathability. If anything, I think the driducks breathed better.
However, that could be the fit and the psychological "feel" of the fabric against my skin.
Opposite to Benjamin, I liked it because it fit better (for hiking) and I liked the fabric. It also packs down smaller, and I didn't feel like I had to baby it. eVent at that weight, tightly rolled/packed, does not like abrasion. The laminate will wear/rubb off. Also it is "stiffer" feeling and a little crunchy.
The driducks is $17 and I wouldn't mind patching it up with duct tape for a while.
I'm even thinking I can do away with my Montane Litespeed and just use the driducks jacket. I use golite reed for pants. Don't get me wrong, I love my eVent, especially for snowboarding and wouldn't know what I'd take on a much longer trip where rain was more of an major issue.
However, with more use of the driducks, and hopefully it not failing on me, the 5-6 oz saved and its $17 price tag will likely make it my main choice over the eVent.
I originally bought the driducks out of curiosity, backup for friends/loaners and to save time used on my far more expensive eVent. So far is has exceeded my expectations..