Why not a 5-star product? I like Dyson, and really would have liked this to workout. Perhaps this is best done in chronological order starting from unboxing: * Only one remote was included - the Amazon description and at least two video reviews indicated there were two remotes (note this product description was current at the time of this review - it may be updated in the future). * There is uncertainly if the filters are asymmetrical or not (i.e. can fit with or without flipping 180 degrees bottom-to-top, or top-to-bottom). The included simple assembly diagram did not say. While one can simply start pushing the filters to see if they fit, I'd rather not do that with such a relatively expensive product, with plastic latching points on the filters. I think the assembly sheet could be slightly more clear whether this was, or was not, necessary. This was minor, but it took a few minutes to determine that it probably (?) did not matter. * Instructions say to download the "Dyson Link" app. There is no app by that name (again, current as of this review). After spending some time looking at apps, the only thing that seemed correct was an app called "My Dyson". While another minor point, I dislike downloading any more apps than needed, and it took around 20 minutes looking to see if this could be an Android vs. Apple naming issue, or a new app, or some other alternate app. It was unnecessary, requiring just a simple update to the included slip of paper. * See photos. Either I already had the cleanest air on the planet to start with, or the unit wasn't fully working--or more likely, the air quality indicators used by Dyson do not reflect the actual impurities of my living space. Really, this did surprise me. My AQI summary, PM10, PM2.5 and even the HCHO formaldehyde registered essentially zero (the latter with a slight blip), right from the moment of startup and for the next 12 hours. Several of the other product video reviews and pictures show how others saw their AQI spike well into the 'red' region, then slowly return to yellow or top of the green scale. Believe me, my place is dusty. I do use a 20 year old original Dyson DC07 vacuum about a 'few' times per year (3 maybe), and also do use a higher MERV-rated filter in the air handler, although hardly the grade to catch the super-small PM2.5 and I didn't even think for the larger PM10. In fact, I'm wiping dust up off of surfaces every week. There is also a "electronics smell" in the office, with all of its cables and electronics. Is this unit really working? It did remove the office smell, and this should be noted. Odors do not have an indicator on the unit (you would use your nose to otherwise notice, of course), and I'm aware that just because the indicator isn't showing all impurities, doesn't mean it isn't working. But to have 0.03 on initial startup, and never go lower? I'm not complaining if my interior air is really that good, but then I suppose I don't need an air filter system, at least of this degree. * I considered keeping the unit only for the fan function. As some will know, Dyson products often work their magic by using a smaller motor working at higher speed, rather than a larger motor working at lower revolutions. While the fan certainly is relatively quiet, the sound it does make is somewhat shrill, perhaps in the 800-2KHz spectrum. This is a problem. I needed a fan that cannot be heard over the PC's camera/microphone, but the TP-09 can be. Ironically, my Lasko box fan can be placed just outside the room in the hallway on speed 2, and throws far more air, yet is essentially inaudible to the microphone due to the lower pitch. The TP-09 has to be much closer to me to notice a similar degree of cooling, perhaps 6"/2m away to have the same effect. At that distance, its noise is picked-up. How could any of this be? Dyson is amongst the pre-eminent fan and air-cleaner brands, and there are so many great reviews. The lack of a second remote might be something to overlook, although I was disappointed by it. In fairness to Amazon and Dyson, there is a remedy to submit a "missing part" prior to deciding on a return. However, the fan's frequency pitch and the virtually negligible effect on air quality really make keeping this a hard sell. I appreciate the more conventional odor removal that it performs, but virtually any carbon filter system will accomplish this at considerably lower expense. For these types of circumstances, the TP-09 just doesn't seem to be entirely suitable.