Construction of my current mattress

Hi. I've just ordered an Origins 1500 which I'm very much looking forward to. I was wondering if you know anything about the construction of the mattress it's replacing? It's branded as "Royalty Beds of Distinction - Royale Comfort". My partner has had it for some years (bought with her ex). Whilst the upholstery seems half-decent, I've never been convinced of it's comfort or support.