Are Dreams Mattresses any good? Bed recommendations & sleep guide

Help!
I have just tried the Dreams mattress Sleep match machine and it has said that my recommended postural support is Firm (the other day Benson's machine said medium 3/4)

Anyway, of the several mattresses recommended, I found the following 4 brands as the most suitable (when I tried them in-store)

- Hyde & Sleep : Lemon (Advanced)

- Flaxby : Natures Finest refine Firm (pocket spring)

- Hyde and Sleep : Orange (combination)

- Sleepeezee : Chelmsford (combination) (my favourite btw)

Can you tell me more about the above items and how they stack up with similar mattresses that you have please? Are Dreams beds any good or should I look for a more reputable retailer?

thank you
regards