Our old Dirt Devil upright started giving off some burning smells (not the brush belt) a couple of weeks ago, so we decided to start looking around for a replacement. We have a two story house, so something to effectively vacuum the stairs without purchasing two units would be nice. Oh, and under $200 please. Dyson's are cute, but $500 is over the top for such a basic device. That led us eventually to Bissell's two lift-off canister units, the Revolution and this one, the MultiCyclonic design.
Initially, I couldn't tell the difference between the two models. Then, another reviewer pointed out the two "wings" on the side of the dirt container on the Revolution model that one customer accidentally threw its two inserts out with the dirt, only to render his vacuum useless the next time he tried to use it. That narrowed it down to the MultiCyclonic for us. The Revolution also has an additional foam filter to be cleaned in its top section, which the MultiCyclonic doesn't use, which was one less consumable to buy.
Both units have a special tool for grabbing pet/human hair off the furniture and the carpet, powered by the suction in the hose, and it works just fine. After "turbo" brushing our carpeted stairs, I had to take the tool apart with a phillips screwdriver, which entailed removing two screws and gently pulling the unit apart. I paid attention so I could put it back together correctly, but it was easy to clean out the hair clogging the unit, and to put it back together.
Some have commented that the unit seems noisy to them, but I actually found it quieter than my old Dirt Devil upright. I also found the suction from the 12 amp motor to be completely adequate. Although some have reported they were wowed with its power, because it was quieter it didn't seem any more powerful to me than my old Dirt Devil had been in its day.
Another reviewer felt the unit was too heavy. I'm 62, short, an avid reader, and certainly NOT athletic, and had NO problems hauling it around.
Another commenter noted that the central dirt/cyclonic unit on the Revolution was completely removable, allowing the whole messy part of the vacuum to be hauled to the trash can for emptying, whereas only the dirt receptacle is directly removable in the MultiCyclonic unit. This is basically true. Removing the dirt receptacle for emptying in the MultiCyclonic allows dust/dirt hanging around above it to fall on the unit, requiring a wipe-up if you're not careful. But, it's easy to reach up and remove the cyclonic unit with a twist and clean it. A regular clean-up after a major vacuuming will minimize the potential mess. A well placed paper towel will catch any dirt dropping down from the top of the cyclonic unit.
I didn't have any problems with the hose connections, cleaning the foam filter, or removing/replacing the HEPA filter on the back of the unit. The extension rod uses a friction twist to lock it into a variable length, and it worked fine. After two hours of vacuuming around the house, I had NO problems with dirt/dust blowing out of any of the hose or filter connections, so I can only assume the reviewer who had the problem had perhaps not been performing regular cleanup/maintenance of the unit, or had inadvertently allowed a hose connection to come loose. When putting the unit together, you have to twist a hose into a connection to lock it in place. If you don't perform the twist, I suppose it could pop out at an inopportune time, but this is a suction line. I don't see any way that anything could blow out of it. The exhaust is via the HEPA filter on the back of the unit, literally inches from the exit of the suction motor. If dirt is squirting out around the foam filter atop the suction motor, it must be mostly clogged. There's really no excuse for this. Take the foam filter to the sink and rinse it out and you're done. Be sure it's dry before reinserting it, or you'll be risking getting moisture into the motor, never a good thing for an electrical thingy.
Overall, my first impression of the unit is quite positive. Unless there's some underlying defect, I see no reason not to expect years of satisfaction with our new Bissell 89Q9 MultiCyclonic vacuum cleaner.