We spent approx. one week at Ottis apartment and had a great time there. The appartment lies in the heart of Venice, but in a pretty little courtyard, so you can walk everywhere you want within 15-20 min, but still have a silent oasis to relax.
It is a maisonette with low ceilings where you have got everything you need - there was even a Caffettiera for the morning coffee.
Nearby there are many shops and also supermarkets and bakeries. Because the apartment lies in a student district there are some cafés and bars with low/medium prices.
We didn't meet Otti in person, but were able to contact her at any time we wanted and there were no problems with arriving at or leaving the appartment. The conversation always was kind and helpful. We can totally recommend this appartement for a wonderful stay in Venice!