Wonderful place to stay in Venice - very comfortable, super clean and spacious. There's a queen-size bed in one bedroom, and a couple of twin beds (one pull-out) in the other bedroom. Some of the older reviews have outdated information: there was a working air-conditioner in the bedroom, and there was also good wifi access.
It's about 2 - 3 minutes to the water taxi stop, but walking is a cheaper and a much less crowded alternative (depending on location and time-of-day, you may have to skip an overcrowded one to wait for the next ). One other tip: the vaporetto day pass seemed like it worked for 24 hours after first validation (which kind of lets you use it for two days if you manage the timing right).
We had a minor issue with keys (in any place that you stay, try out the keys first!), but it was resolved promptly the next day. Garbage and recycling is a little tricky; it's easiest to just bring the garbage out early in the morning at the barge by the bridge (just a minute away) rather than waiting for the collector.
Overall, a really great place to stay.