the gospel. I subscribe to their magazine, and my ownership results based on their recommendations for a microwave oven and vacuum cleaner have been less than stellar. In fact, CU has flunked my independent testing thus far.
Anyway, based on their testing, I bought a Kenmore True HEPA vac a couple of years ago. It's a pile of junk compared to older vacs I've owned. Yes, the HEPA filtration is nice, but recently the power nozzle broke near the hose attachment base and the accessory lids on the canister portion are difficult to close. The vacuum does a reasonably good job of cleaning the floor, but the bag fills up too quickly; and the quicker the bag fills up, the quicker you lose suction power.
I just bought a Rainbow D4 SE used for $100 and won't be looking back. It cleans as well or better than the much newer Kenmore (it's a 20 year old vacuum cleaner). You won't incur the same expense replacing filters as bagged vacs either. Plus, replacement parts are very reasonably priced (unlike the Kenmore). So, don't listen to the naysayers. And BTW, even with my older model they included a foam filter for use if picking up substances like sheet rock dust. Still, it's probably not ideal to use it for that. That's what my ShopVac is for.