Ok - I have some cash from a "leaving present" and I'm thinking of joining the bivvi-brigade. I've done lightweight camping for years and am currently using a Macpac Microlight. I tried a bivvi bag years ago (for one night) and didn't really feel that comfortable.
So - for those that use tents AND bivvi on occasion - do you really think it's worth this investment?
Should I go for one with a hoop over the head?
Will a down sleeping bag be OK, or is moisture be difficult to manage?
Any recommendations (I suspect it would have to have some sort of midge net tho...)