PanasonicVac
I'm not saying that all bagged vacuums aren't going to have any kind of dust-leakage when being replaced, just that it wouldn't be nearly as bad as if you were emptying a bagless machine indoors. When my dad trash-picked a DC07, he warned me to only empty it outside, presumably for this reason. Recently, I was helping my mom deep clean her room with her Bissell 82H1, and when it got full, I was told to empty its contents into a plastic grocery bag and throw it in the trash outside, which I get why she made me do this, but its counter-intuitive. As for cyclones, I've never really thought much of them. I treat them the same way that I treat edge-cleaning features on vacuums, it's cool that they're there, but I don't think always do their job of filtering fine stuff. I've seen plenty of pictures of clogged Dyson cyclones to make me skeptical of them. As for paper bags, I'm sure there are decent ones out there that filter pretty good, but from my experience, you're better off with HEPA bags.
As for the Amway Cleartrak, that's actually a bagless machine I like. It's looks are cool, and it's been said to clean well. I can't prove nor disprove those claims, but the CRI seems to think its decent, as they gave it the silver rating. However, I wouldn't recommend it for many applications, because apparently it has very poor filtration, and the open-top dirt cup doesn't bode confidence in me. As for Vacuflos and other similar central vacs, the only thing I can say for certain about them is that they're likely 10x more messy to empty than portable bagless vacs, due to their increase bin size. I know with cyclonic Vacumaids and Centralux systems, you can get plastic bags that make replacement more hygienic, but again, that's just counter-intuitive. I can't really speak much on workshop dust-collection systems, but those also seem like they'd be messy to empty.
In short, while there may be some bagless machines that are decent, I just think bagged machines are safer bets.
