On the plus side:
This is a lovely flat and we found Marsala to be a friendly and lively city with few tourists and lots of local people out having a good time.
Less good:
We found check-in very stressful because our host did not reply to messages or phone calls when we arrived at the pre-arranged time to meet her.
The listing states that there is parking and whilst there IS an underground parking space, you need to be aware that it is so tiny that nothing bigger than a Fiat Panda can fit into the space. Street parking is difficult in the old town.
We did not think that it was made clear in the listing that there would be an extra charge for bed linens and towles on arrival, but maybe that was our mistake.