Here is a demo of the Permabag System 2 "in use"
The Permabag System 2 was MUCH better than the original, from my experience. The Permabag System 2 didn't really drop in suction at all when compared to the original, it seemed to be no more inefficient than a paper bag. Emptying the System 2 is a bit of a messy job (as the video shows near the end) but no where near as messy as the original. With the Permabag System 2 your hands stay more or less, clean, as you don't have to touch the dirt, you just hold the box on the outside and bash it against the bin a couple of times to release the finer dust.
I am not sure what Hoover reccomended, but I reccomend that every 2 or 3 times of emtying it, just give it a rinse and it is as good as new.
I wasn't going to make a video of me doing this same test with the Original Permabag System, with the Turbopower Freedom, as it would of just been a nightmare!! It would clog INSTANTLY in the first pass, it would be spraying dust out everywhere and the hole thing would just get FILTHY...So, I will leave that test for the original Permabag System to your imagination.