Read updated review part too.Original reviewThis seemed to be the perfect replacement for my old Roomba and it is much lower in height. But it has to be connected to the wifi in order to work and my wifi is 5GHz or 2.4GHz and it smartly chooses which is the best one to use for the device.However no matter what I tried this Eufi would not connect to the my wifi. So I had to send it back.Disappointing as all the Eufi vacuums are wifi and I don’t trust that any will work now. So will be steering clear of them from now on.UpdatedAfter my initial review above. Eufy customer services contacted me to find out if they could help with the wifi issues. They were very helpful. Eventually I worked out how to turn off the SmartConnect function on my NetGear router.Once I did this the Eufy hoover connected straight away. I could then turn SmartConnect back on and it stayed connected.As you can see from the photo the Eufy is not much smaller in diameter to the Roomba 650 (caveat in all this review, the 650 is old so not really a fair comparison). Though the diameter is roughly the same, the Eufy is marginally lower in height and this makes a big difference as it fits under all the cupboards and the coffee table in our house. The Roomba did not.I thought the Internet connectivity for the Eufy was a bit of a gimmick - after all why do you need an internet connected hoover? But it turns out it is fairly useful. I like the fact it maps out the rooms it vacuums, the ability to set schedules easily, amend the suction power for each of the scheduled cleans, the ability to start / stop / send it back to charge remotely and gets updated firmware. It is also possible to steer the vacuum from the app - I did this once when it couldn’t find its way back to the dock (lazy, I know, as I could have just picked it up).The Eufy is quiet, really quiet. Not just the suction motor, but the drive motors and the general movement across the floor. The Roomba rumbles across the floor which can be heard on the floor below (as we have wooden floors). The Eufy makes no movement noise. I have had to check the app before to make sure it had actually cleaned as I was upstairs working and did not hear it at all. This is a real strong point for Eufy.The app sends push notifications (if you allow) that tell you if it’s stuck, lost, being picked up. So it’s chatty.It also has a “Find my RoboVac” in the app. I’ve not used this yet but I can see it could be useful. Though I don’t have a big house I have on occasion had to hunt for the Roomba when it’s got stuck. So this could be useful. Eufy, draws a map of the area it’s hoovering in real time so you can always use that to find it if it is stuck.The return to charge point is much more effective on the Eufy as it marks on the map it’s charge point, then draws the room and obstacles as it goes. So when it finishes or needs to recharge it goes directly there rather than hoping it passes the beam from the docking station (as the Roomba has to do). If you put the Eufy on a different floor to its charge point, it will note it’s start point and return there when it is done.Some minor niggles with the Eufy:1. It doesn’t have a carry handle - the Roomba does.2. Emptying the bin is fiddly and the instructions aren’t clear which big you have to lift. Once you know, you know but it took a few attempts to work it outThis is not meant to be a Roomba v Eufy comparison as my Roomba is at least 8 years old. However new Roomba’s are far more expensive and, in my opinion, the Eufy is much better value. Am a definite convert to Eufy.