Initially the area of Mestre is not great which various undesirable people milling around looking dodgy. I wouldn’t go out on your own at night.
My first room, stank of cigarette smoke, drawn in via the AC. The bed sheets had holes in the but although very basic, it was at least clean. I asked to move rooms after the first night, which was kindly accommodated, but the room was very noisy both inside and outside. For 3 nights I didn’t sleep well at all. The shower in both rooms also went cold after 2mins. Over all the hotel was poor, not a 3 star … more a 2 star and I probably wouldn’t go back again.