Very disappointing.
While the apartment is clean, tidy and modern it is utterly without charm or comfort. It appears that it once was one large apartment and now has been converted into three single units. My unit (Black & White) is very small and poorly laid out with some very annoying features (no furniture in the bedroom; just a bed). The blind in the bathroom for example - it overhangs 1/3 of the way over the toilet.
There's also no place to hold toiletries in the shower.
There's no power outlet / plug in the bedroom (just USBs - and the ones on the right don't work).
No kitchen towels or tea towels in the kitchen.
No coffee maker.
The most uncomfortable sofa (nowhere comfortable to sit).
No duvet cover on the bed (just sheets and a duvet...poor hygenic practice). No additional blankets for the bed in winter.
Most of all though - the neighbourhood is very poorly served by anywhere decent to eat and so many homeless people hanging around on the streets below....it feels unsafe and lacks any sort of charm you might be expecting from a trip to Venice.
Mestre is grim and nowhere near Venice, but the train station is a 10 minute walk away and the area is also well-served by public buses and trams.