We have the city sofa. My husband doesn't like nailhead trim and various other style details. It took us ages to decide on city.

We are casual people. My husband is 5'10 and I'm 5'4" and we have a son who is 6.

RE: depth and height for sitting, I think it's fine.

We are both fine taking naps on it individually.

When one of us cuddles to read or nap with our son, we pull off the back pillows and rest our heads on the arms.

RE: depth for 2 adults to lie down on it. Possible if you're both fit.

I've put on some weight and my hips have gotten too wide for my husband and I to both lie cuddly on it, like we did on our other sofa when we first married.