I bought the Rubik III 2 seater plus ottoman. I liked being able to choose my pieces and fabric. My favorite feature is the removable,washable covers. It is very firm, but comfortable. It's great for extra seating or to take a nap on. It was extremely easy to put together, my teenage son did it all by himself. My other favorite feature is the storage! I loved the price, under $700 for my 2 seater with ottoman. I had seen some similar for less, but they weren't washable, and some didn't have storage.
I liked how well the modular pieces are held together.
The only tiny criticism, if you will, is I wish the storage areas' lids were hinged and stayed up, instead of having to remove the cushion AND storage area cover every time I wish to use it. But again, that is a very tiny inconvenience, more like a personal preference. But overall, I am extremely pleased with my purchase