We have a very old one we inherited and despite it not looking very comfortable it's great to lay on and watch TV. I think definitely worth the investment. We had ours recovered when we got it and will do again when it needs it rather than get rid .
We have a leather chesterfield, another leather sofa & chair from Thomas Lloyd for around 15 years now. The chesterfield still looks ‘stiff’ but us actually very comfy and my preferred slob sofa. The other one looks squishy but is no more or less comfy.