The location of this apartment is really great, just off a small piazza (campo) and 1 minute from Rialto bridge. Reasonably quiet too, given the central location. The owners were very nice and very accommodating - they provided extra sheets, a new hairdryer to replace one that had been broken and allowed us to leave a little later the day of checkout.
The apartment was clean and is fine for a 3 day stay, but probably not longer if you are 4 people, as we were. Really very small, and no place to relax (no real living room) and you can't really cook there either. Beds were not very comfortable.
(Note: For some reason a version of the listing says 2 bathrooms, but it does only have 1 (as the original listing outlined)).
In summary if you are looking for a well located, clean, small apartment for up to 3 people for a few days, this place would probably fit the bill.