I recently purchased a Brunton 8097 for exactly the reason spelled out by Hikin Jim. The declination math is too easy to get wrong and double-checking takes a lot time. And while my GI lensatic compass was very accurate and durable, for me, reading it was kind of a pain since you have to get the lens, your eyeball and your target in just the right place.

My Brunton also came with a bubble that irritated me quite a bit at first. The bubble is the same size as the "N" circle and it does seem to make the compass disc tilt. However, after some casual testing, it does not really seem to affect the bearing. I had gotten over it until I read this series of posts. So a couple of hours ago I sent an email to Brunton's customer service simply asking if I should return the thing. If I hear anything worthwhile from them, I'll post it here.