Haven't used them, but I've read posts from a number of people who use the Mountain Laurel Designs or Oware Mids and find that they are very wind resistant. I did use a Six Moon Designs Lunar Solo, also pyramidal, for a year. It was very wind resistant but was too small for my dog and me and had a lot of condensation inside.

They also have their problems. I haven't yet found a bug bivy big enough for both me and my dog that, in conjunction with a mid, would be lighter than my current tent or provide as much bug-free space.