Thank you all guys for your feedback.
fellazb Yes, you are probably right. I had created 2 cushions in Marvelous with 2 different types of wrinkles, so I have only used those 2 throughout. I'd probably better create some more variation;
daniel266Glad you like everything aside from the curtains :p I don't mind them that much tbh;
johnymrazko No special lighthing, just an hdri. I always end up using mainly either Peter's or Vizpeople ones. As far as the sofa goes, I have created the back cushions and the seat cushions in Marvelous while the lower structure was done in 3DS Max. Will provide some info and screenshots on the cushion material tonight when I get back home.
Thanks again guys !