We have just completed a 3 month stint around NZ on the push bikes, combined with a Sea To Summit Overhang tarp shelter our bivvys have been working a treat.

They did arrive with some minor delamination bubbles, particularly around the entry which we intend to deliberate on with Outdoor Research, apart from this they were of exceptional quality.

They definitely hold the rain, snow and frost out in the most appalling conditions and providing the pegging loops are used top and bottom to open the bag up to allow condensation to escape they stay dry inside also :)

I have found a trick for keeping the hood right back so you can just use the fly, you work all the fabric back up and over the pole till the hood is inside out (can b a litttle tight but do it bits at a time like putting a tyre back on a rim)
then just pull enough back over to zip up fly. Attach a carabiner to the loop and run a occy strap down to a peg on the ground.
For full weather protection without dying of suffocation, place your boots covered by a waterproof bag directly in front of your bivvy, zip your fly all the way up and pull the under section slightly back so the outside can drip straight to the ground and then drop the top section down and over your boots slightly, no probs!

Be careful not to damage the pole sleeve by shoving too hard, it may pop through the far end, as my partners did!

Turn them inside out regularly and air, avoid leaving damp in bag, we aired ours out regularly and they still have a little mold.

any questions just email us at bacterialbalance@hotmail.com
i hope this helps potential buyers
cheers