My comment only comes in the form of having just sat in a "modern rectalinear" sofa for a few hours the other night. In general it was a neat looking piece of furniture but it was horribly uncomfortable for anything more than a few minutes. The comments that came out during the party were:
1. It was too deep. To rest your back you had to sit way back in the couch. The shorter women couldn't sit on the couch and bend their knees.
2. Too hard. It looked soft and comfy. But when you went ot sit, you damn near broke your tailbone.
3. Back too low. The back came up to the middle of my spine. My core fitness was not good enough to sit comfortably in this couch