Are Activated Carbon filters worth the price? They are almost double the cost ofthe standard paper cabin microfilters.

My i-drive says another 11000 miles but I got mine changed 18 months ago and recently opened to check them. They appeared really dirty.
How often do folks change their cabin microfilters?

hmm, usually at every 60.000 km's.

Always the active carbon! :)

Hi do mine at about 30,000 miles lot of city driving so they were absolutely filthy got my replacements on-line prpoer oem quite cheap think about 40 euro for the 2

Carbon

Well for me, I change every 6 months or so and I use ebay cheap $20 filter.
Since I change it very often that I feel normal in cabin filter would do fine.