We have one but I don't like it. I'd rather use a normal blanket. you have to lay down when you use it beacuse it doesn't have a way to close in the back. And it holds a lot of static electricity so after getting shocked a couple of times I was done with it.
I bought one to use while I am working on my computer in the office, but it hasn't worked out the way I would have liked. The blanket "sleeves" move with you and I find that I inadvertently knock into things. Not a good thing! Now I am back to wearing a sweater and putting a regular blanket across my lap.