Ach, the points asked on the last page have been well answered.
It is possible to stay dry getting in and out of the Three Wire, and for a bivy it is pretty comfortable for extended living. I've lain in it and watched the weather go by quite happily. Sitting up with the wire installed isn't an option, but take the wire out you've got a regular bivy bag.
I use the Three Wire over the lasercomp if I'm worried about the availability of a good pitch, such as on ridges etc Its low profile is spot on for avoiding the worst of the wind as well.

