Above are some pictures I took with my phone, showing the Aero-vac which I purchased from Casino187 on ebay
, for use with my 1.5 year old 535 Roomba. Here are a few of my opinions / observations regarding the Aero Vac vs the old style bin.
1. Quieter - It is dramatically quieter, I did not take out the ol' Radio Shack dB meter, but I would venture to guess it is at least 30% quieter then the old style vac. I would guess this is because the vacuum positioning is not creating as much as a rattle / vibration with the plastic.
2. Larger capacity - again I did not take any volume measurements (lazy) - but visually it appears much larger capacity.
3. Same filter material - The Aero Vac filter is the same material as the old yellow edge filters, just more surface area (it seems) and stretched tighter (not as loose). These filters are now on the iRobot website for purchase, but I did not see the aero vac bins, yet at the time I visited.
4. Foam type gasket around the edges of the filter, presumably to create a tight seal. While I do not know if this affects the vacuum suction, it does not really prevent the vacuum from getting dirty. You can see in one of the above pictures, some particles still get past the filter, onto the vac, and out the exhaust.
5. Picks up the same amount of dirt. Again just my opinion, but you can see the above dirt is from 1 day of non-vacuuming in my apt bedroom with 2 cats. I Roomba daily. In my test, the Aero Vac picked up the same amount, if not more, pet hair, litter, and "stuff" as before. I am very happy with the performance.
6. Not as much hair wound around the CHM brushes. Is the hair wrap around both ends of the brushes totally eliminated? No, but it is somewhat reduced, and a welcome improvement. (sorry no pics)
Overall based on my personal experience, the Aero Vac is an improvement, something I would add to all my Roombas. Now obviously this is just my opinion, your results may vary. I personally liked the 6 arm side brushes better then the current 3 arm brushes, so it is all personal preference.