Staying at Alessandro's flat is highly recommended! It is in an advantageous location, less than a 5-minute walk from the Mestre train station, which in itself is only a 15-minute bus ride into Venice bus station (number 2 bus goes from right outside Mestre). The clean and modern flat has everything you need. Alessandro is a fabulous host, who spent lots of time on Whatsapp advising me on travel arrangements and recommended restaurants. This was particularly kind of him, given the relatively meagre amount we spent on the rental.
The acid test - if I was going back to Venice, I would definitely return here.