I have researched the Brunton Bubble on my 8096 and contacted them personally. The conclusion I have found from them and in other forums is that the bubble does not hamper a solid bearing. My own testing proves this, at least with my own units.

I will continue to use the Brunton in my EDC. I love compasses. I would someday like to have a gentlemen's compass like a Dalvey or Brunton for dress occasions. I have a GPS in my phone but I don't trust it.

I agree with others that the declination aspect of the Bruntons is superior to Silva and the Lensetic. No key, screwdriver or math needed. I like the Brunton style of circle in a circle. Different but good.