It's useful. You can schedule it and it will run when you're out on a walk with kids. It picks up a lot, we run it 3-4 times a week, and I think it's pretty efficient. 14mo old is obsessed with it, likes to follow it around and even asks for "drrn drrn" when it's not working.

I had a roomba years ago. I have dogs. I found that cleaning the dog hair out of the roomba took a lot of time. Got to the point that it wasn’t worth the time savings. Now I just use a cordless stick myself quickly. Has the cleanup gotten any better for dog hair?