So far I love mine too, it seems to really clean well and is very well built. I haven't noticed much dirt getting past the first filter yet, after using it to vacuum my house twice I took the second filter out and tapped it in front of a light to see what would come off of it, nothing I could see in the light did. The fluffy dirt does seem to cling to the filter, but there;s not been any noticeable loss in power, I suspect the layers of fluff are helping keep the fine dust from caking on the filter, so that may be its secret to maintaining airflow.
[URL unfurl="true"]http://https//www.youtube.com/watch?v=c4zWUMIuAKI[/URL]
