This is a great apartment. Tidy, clean, and in a quiet part of Lido. It's a little far from the Palazzo del Cinema (where the conference I was attending was held), and even farther from the waterbus station, so definitely buy a bus ticket (they run frequently) to get there and back. Once there, the bikes are really (really) helpful to get around. They saved me a lot of time (and bus ticket money) and it's an easy ride to pretty much anywhere since Lido is very flat.
One small drawback: I was sharing the apartment with my colleague, but we only had one set of keys! So we had to make sure to synchronize, and it would have been really great to have two.
Giulia (the host) was really helpful and responsive. My colleague did the check-in and told me everything went very smoothly. The apartment is equipped with a full kitchen, a washing machine (with detergent--nice!), a living room, and two large bedrooms. The only (minor) downside is that the shower could use a little more water pressure... so make sure you wait until the water gets warm before getting in. I promise it will, eventually!