The apartment is very centrally located in San Marco - about 5-8 min walk from the Piazza. We found the place very cozy: the bed was quite comfortable which you would need after having walked throughout the day along the streets of Venice.
It’s a good sized accommodation for 2 adults and maybe 1-2 kids. The host may want to improve the lighting in the apartment as we found the lighting quite insufficient. The TV was also not working for all the 3 days. It wasn’t a necessity but found a bit annoying trying to make it work.