I visited Venice with my friend and we really enjoyed our stay in this apartment! Location is just perfect: near the train and bus station, near the restaurants etc and not located at the most touristic, crazy part (San Marco) of the Venice but it was still easy to visit San Marco.
There's a small grocery store really near the apartment :)
We didn't meet Valeria but her friend Anna picked us up from the Piazzale Roma and walked with us to the apartment and answered to all our questions. When we left, we were able to do a late check-out around 4 pm :). We can really recommend this apartment!