Shark AV752 ION Robot Vacuum, with Tri-Brush System, Wi-Fi C (Open Box)

I do NOT recommend this model. I used to have the RV750/R75 until the motor or something in it that spun the brush roll failed after 2 years and Shark CS advised me that particular unit was obsolete and replacement parts were no longer made. So I bought this, the AV751. It's dumb as a stump in comparison. It rams into everything (causing it to push around smaller/lighter things), never goes into edge cleaning mode like the other one did, pushes the magnetic strips around, and will even run into its own dock (moving it so that sometimes it can't dock when done)! It will also randomly stop then play its "starting" music/tones and start going again, resulting in the run time as shown in the app to reset. It has also on occasion suddenly started from the dock without anyone telling it to! (Though this is usually some minutes after it returned to the dock on its own, but not due to low battery.) It also seems to have this issue with the magnetic strips when it goes into dock mode. If it is attempting to return to dock, but is in some area where it can't detect its dock, and then it runs across a magnetic strip, it will become obsessed with attempting to find a way around the strip. It'll either eventually succeed (I've come home before and found it in an area it shouldn't have been and couldn't figure out why), or it'll eventually give up and stop, sending a notification to the app saying it is stuck on a magnetic boundary strip. The dust bin is also designed differently and, in my opinion, poorly. The lid is held shut with a couple small balls that fit into holes on the bin. As a result, when opening, it sort of "pops" open, causing a small cloud of dust to poof out. I have bad allergies to dust. That small poof is enough to put me out of commission for the rest of the day if I breathe it in. The old model unit I had, the lid merely rested on top of the bin, so this was not an issue. In this new unit, the filter can also sometimes slip out while opening/emptying because of the way it's designed and positioned (again, not an issue with the older model). Otherwise, the battery life seems great compared to the old model I had. Lasts about twice as long. However, for whatever reason, the unit won't actually run the whole duration unless it can't detect it's dock (ie, putting it into another room). It'll only run about an hour (half duration) before auto returning to the dock. This unit is dumb enough that it's making me regret my decision to buy it.... Update (4/22/21): So, to make matters worse, this morning I woke up to the unit making a beep every few seconds. Couldn't figure it out, so called Shark. They inform me that a bad update went out for this particular model (AV751) and that it should be resolved in another couple of hours. I obviously have questions on how this happened, but whatever. I can wait a couple hours. 4 and a half hours later... it's still doing it. I call them back. They now inform me that my unit is going to have to be replaced and it's going to take upwards of 10 days to arrive. Grrr.... Oh, and it's the base unit, only. It's on me to swap the brushes, roller, battery, etc to the new unit. *rolls eyes* But then, they need to check the warranty status to make sure I qualify. Excuse me?? You all sent out a bad update that bricked my unit, but if it's not in warranty I'm SOL??? It was in warranty still (only 6 months old), but what I'm hearing is that if in another 6 months to a year this happens again, it's gonna be on me to replace. I'm so pissed right now. >:( Update (8/27/22): One of the wheels that drives it has stopped working. It just goes round and round in circles, now. This is the second Shark ION Robot that I've had that breaks in 2 years. I just bought an iRobot 600 series to replace it....