First of all, all the information given is correct!
The apt is really nice and perfectly clean.
We stayed with our 2-year old daughter and my parents (4 adults and 1 child). Already the welcome was really hearty: our child had a high chair and a baby cot prepared, there was coffee for us, etc.
This is an exceptional service and should be pointed out.

As I said, really clean.

There is also access to the garden which is really rare in Venice.

Regarding the location, it is really central and easily reachable ba Vaporetto (the public transport boats in Venice), even with a push chair. The Vaporetto-station is called "S. Stae".

Have fun, you will enjoy it!