Love this futon mattress! A relatively inexpensive way to update an old futon frame. This is much more comfortable than the standard mattress that came with the frame 20 years ago!
The “leather “is very soft with only a slight, un-offensive odor. 
Expanded to about 7 inches. 
The color is a dark true brown, no hints of burgundy. 
Has not been used as bed, and will likely only seldom used as such. 
Would expect it to be quite comfortable. 
There is no visible “hinge” as it just naturally folds in the appropriate spot according to measurements listed. 
The “leather” is very wrinkled due to packaging, but to be expected. Hope this will ease over time. Meanwhile a nice throw covers most. 
Love this thing!