This is the chair I use at my sewing machine (the purple one, not the dog.) I have one of those mechanic's stools that I use when I'm cleaning out the bobbin area of my longarm. I wouldn't want to use that at my machine, though, as it rolls way too easily. Also, I often lean back in the chair at the machine to stretch my back. I'd probably forget I was on the stool and go tail over teakettle. Then I WOULD be sitting on Daisy Dog.