We had a great stay at The Arch, which is situated on a small piazza with some bars and restaurants and in foot-distance to all the sigh-seeing-points. Very comfortable interior and everything there you need for some nice days. The noise from the piazza is very audible though (until the bars close).
The the waste disposal concept takes some getting used to (the same everywhere in Venice) and for a stay of only 2-3 nights it would be nice if the hosts took care of it. Further, it was a bit a pity, that we could not leave our luggage between check-out and departure (1-2 hours). But we got helpful instructions for storage at the bus terminal (5€ per bag).
Overall we had a great stay and estimated the very good location and would therefore recommend the appartement.