I also have this one. Well, two, actually. I saw it massively discounted last year, so I bought another, ready for when the first eventually wears out.
I practically live in it on weekends! The cotton is really silky soft and washes beautifully.
For deepest winter I have a towing dressing gown.
I find that all dressing gowns are skimpy and gap when you sit down, leaving your lap bare, so I'd advise getting one a couple of sizes larger than your actual dress size.