I got the chocolate brown slipcover with the separate cover for the seat cushions. The fabric was okay, but not as soft nor thick as I expected. I found it easy to position the cover because of the guide tab labels.
My sofa has removable pillow style back cushions that rest on the seat. I had to fit the 2 seat cushions side by side into the long single seat cover and zip them up first. It was a tight fit. I struggled to squeeze the cushions really hard under the zipper just so they would actually zip together.
Then picture this: I no extra hands to help me. I first had to lift and slide the 2 back cushions far up enough with my hands and hold it there long enough till I could do the next step: I use my knees to push the seat cushion piece into the right place, left side, then right side, a little at a time, left and right, repeat. All this time I had my hands on the back cushions. Finally the seat piece was pushed all the way back, right under the back cushions. Only then could let the back cushions rest and slide down on the seat.
A few more tugs, over the back, the arms, the front, under the seat. I think it took me a good hour or so to finish putting the cover on my sofa. This is definitely a 2-person project, plus lots of patience.
I guess it is worth the effort, since I do prefer how it looks now with the slipcover, than the old worn out fabric.
If I could re-design it, I would make 3 pieces, one large cover for the back and arms and front, a separate one for the seats, and another separate piece for the loose back cushions. You will make more happy customers with that 3 piece design.