I love my little robot. It gets the job done. I gave it 4 stars for a few reasons: 1. After having it for over a year, it doesn't always start when told. Sometimes I have to turn it off and turn it back on OR unplug it. Sometimes it just refuses to work and so I have to come back to it later. This is the most frustrating aspect, but it usually does resume working. 2. The scheduled cleaning doesn't work. It could be because I'm not connected to the internet, but the schedule on the remote doesn't do it's thing even though it will allow you to set it up. 3. It picks and chooses when to bump into things. Ex. I have a metal dog bowl full of water on the floor, it will bump into it repeatedly and sometimes push it across the floor, but with a random box on the floor, it will completely avoid it after getting close. 4. It does get tangled sometimes, but that's not enough of a reason to not use it. Pros: 1. Came with two filters so I can clean one while the other stays in. 2. My dog sheds and this helps keep the hair on my floor to a minimum. 3. On low, it's pretty quiet. I tend to run it on high though so I have to adjust to the noise. 4. The remote makes the cleaning process a little more personal. You can redirect the vacuum over specific spaces. 5. The ease of using a robot vacuum is great. You don't have to stand over it to make sure it's doing what it needs to do. You turn it on and forget about it. 6. The battery life is decent. It cleans on high power for an hour and some change (1 bedroom apartment about 750 Sq ft).