Bests & Worsts Reviews from Amazon

Just a few notes, this is going to be quite a long review that compares to the A4 as I already have that model. The left wheel on the A4 stopped working about 10 months after purchase so I thought I might as well go for an upgrade as I really liked the A4. Also, I realized the other day that it was still under warranty so I contacted their customer service to see if I can get it fixed. My thoughts on that process is below as well. First, this model is definitely an improvement over the A4. It's not a life changing improvement but an improvement nonetheless over some important aspects. There are certain things that remained the same and a few things that got worse IMO, but those are very few and might not even matter much to you. Second, if you are not familiar with how these vacuums work, here are some basic cleaning mode info for this and probably other similar vacuums of this type (all modes are shown in the video): Auto Mode (press the "Play/Pause" button and it will start to clean automatically, you can also schedule this to run on a daily basis at a specific time) Manual Mode (you can manually move the vacuum by pressing the 4 directional buttons on the remote control) Spot Mode (to clean a specific spot, press the "target" button on the remote, and it will keep rotating out in a spiral to clean that area, until it hits an object) Edge mode (press the button that has the square with an arrow and it will head for the nearest edge or wall and start to clean along the perimeter of your home). The PROS: Runs extremely quiet on normal mode, slightly louder on max mode. However, keep in mind that you will need to clean the brushes on a regular basis to maintain the low noise level. The Virtual Wall works really well. The signal seems to pass through solid objects as well. The vacuum will move in a wave pattern instead of straight like along an invisible straight wall. Also, the Invisible Wall block itself seems to emit a "bubble" so the vacuum will avoid it in a circular shape (you can see this in the video). Edge mode works better than the A4. It can go through the whole perimeter of my home without going off course. A4 seemed to break course once in a while. Moves much closer to walls and edges than the A4 does, thereby cleaning the edges near walls and objects much better. The rotating brush is definitely better on this than on the A4. It is now bristle-less so it doesn't trap dust in the bristles and it's easily washable. Also, it can be taken apart (mostly) to clean the hairs trapped in the rotating mechanism. HEPA filter now has an additional filter on it for added filtration of dust. the additional filter works so well that barely any dust even gets onto the HEPA filter. The MIDDLE: Nice and sleek looking glossy glass surface on top but very easy to see dust on top of it (see pics). Doesn't look very pretty after just one cleaning. Not very appealing, aesthetically. I use a Swiffer duster to clean it once in a while. Slightly longer run time, quieter operation, very slightly shorter in height but at the same time much heavier compared to the A4, probably due to the glass surface area on top. Rubber bumper is helpful in protecting furniture but gets dusty easily and very hard to clean dust off. Also not very appealing aesthetically. There is a vent on the right side that blows air out. Might be used as an exhaust to cool down the internals. However, it is a pretty strong wind so I feel like it might be unintentionally blowing dust around. The operating time is about the same as the A4, maybe ~30min more, but they both can go for 2-3 hours at a time. The CONS: The left bristle brush somehow got caught inside the gap of the bumper and shut off. This never happened on the A4. However, this only happened once and was probably just a freak incident due to the way it hit my low-pile rug. Still slams into dark colored furniture/objects pretty hard. Dust bin seems slightly smaller than a4 and still have to be pretty careful when pulling it out to avoid spilling dust everywhere. Also, harder to clean now because it has more edges and surfaces. This happened only once so far but it had some pretty major trouble going over a certain spot of our bathroom's marble transition strip. The A4 always struggled with this a little bit but it would eventually (after 10 seconds or so) either go over it or just back up and go somewhere else. This model would go over it but get stuck halfway and would be stuck there indefinitely. Still has trouble with table legs and when chairs are close together around a table. It seems to be trapped in its own endless maze and keeps going around them over and over. FINAL THOUGHTS: Be sure to clean out the rotating brush regularly. Hair can really get trapped in there (see pic with the hair in my hand), causing the operational noises to be louder. Compared to A4, the height is maybe 1 or 2mm shorter I think, which could be a good thing depending on your home. For me, it keeps getting trapped under my computer chair due to that slightly shorter height. Customer service was very helpful and easy to deal with in replacing the defective wheel for my A4. At this moment, I am still awaiting delivery of the part as it does have to ship out from China.