I put the SNU on my Wildcat... worth every penny. I've seen too many poles scoop water and break at the rivets. The SNU addresses these problems and actually works better than any other snuffer I've used.
It might be a little bit harder to snuff with mesh instead of sailcloth at the bottom, but it's worth the reduced stress added by the lack of drainage in a full sailcloth snuffer bag. I've not noticed any added wear to the spinnaker from this.