I bought my Robomower about a year ago, and decided I've probably had it long enough to make a comment.
My wife and I moved from our house in the city to a place in the suburbs with a half-acre lot. I… spent our first summer using our walk-behind mower, but quickly decided that was for the birds. It took hours. All my neighbors had riding mowers, but I didn't want one of those. It seemed a little too stereotypically suburban. So in researching mowers I discovered the Robomower.
Now, I am not an early adopter by any means. I don't go for the latest gadget. But I learned that the Robomowers have been around for about ten years now, and have been much improved since the early models. And the Robomower cost about the same as a riding mower. So after doing a lot of research I decided to take a chance on it.
Someone else left a comment here saying that the Robomower comes with poor documentation. I really disagree. The manuals were well-written, and I was surprised how easy and straightforward the set-up was. The most monotonous part was laying the perimeter wire. That probably took me three or four hours -- but then, I have a rather large yard.
Once the wire is set and the docking station set up, you just let the mower charge up and then -- off you go. It runs pretty quietly, and sounds very much like an electric weed trimmer (the three blades underneath the mower deck look quite a bit like trimmer blades, actually).
One of my neighbors came over to see what I had trolling around the lawn. "My wife and I saw it but didn't know what it was," he said. "One day I said to her, I think it's cutting their grass -- I don't see him out there with the lawn mower anymore".
In terms of the quality of the cut, I think it does pretty well. Your lawn won't look like a golf course, but I'm not that picky. Looks pretty much like it used to when I cut with the gas mower. Robomower has soft bumpers on the front and back so that if it runs into a tree it will simply toddle off in the opposite direction. It doesn't seem to hit very hard, and I haven't noticed any damage to the bark. When the mower battery runs low, it automatically goes back to the docking station. Once in a while it had trouble finding the station, or had trouble docking on its own, but it would usually make it by itself. Worst case scenario, you can simply use the manual controller to drive it back to the station.
You can run perimeter wire around a tree to keep the Robomower from hitting it. I will need to do that for one of the trees, as Robomower keeps running up on one of the tree roots and getting stranded -- its wheels keep turning but it doesn't get anywhere. Then I have to walk out and drag it off. But generally, if it gets a wheel stuck in a chuckhole or something, it will just beep loudly and start off in the other direction.
There is a manual setting that allows you to use it as a conventional electric mower, ostensibly for doing small areas that don't fall in one of your zones. You simply pull out the control panel (it's connected to the mower by a 4-foot line) and work the manual controls as you walk behind the mower. However, this is not very easy to use. You have to hold two buttons down simultaneously (one to move the wheels, one to run the blades) as well as manipulate the direction controller. My hands tended to cramp up within a couple of minutes.
If you start with grass of a reasonable length, Robomower will do a good job maintaining it. But it has a hard time cutting overly long grass. Because the mower is heavy (it's about 80 pounds with battery) it tends to flatten down long grass before the blades get a chance to shear it off. So you probably don't want to give away your gas mower - you may need it once in a while.
The literature says Robomower can work in the rain, but I wouldn't recommend it. The tires can get kind of gummed up with wet grass clippings and tend to slip. It will mow at night (you can see the blinking light on the top even if you can't see the mower), but I really haven't bothered. Usually, I start it up on a weekend, when I'm doing other stuff around the house.
Overall, it cut the grass trouble-free throughout all of last summer, and it was a snap getting it set up again this spring.
Robomower handles different zones, but be aware that model that comes with docking station can only be used for one zone. There's a battery-powered perimeter switch that can be moved from zone to zone, but that's not included with this.
Overall, though, this was a good purchase for us. If you're thinking about buying one and are on the fence, I'd recommend you go for it.
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