amazing hostel, lots of amenities, and although not in Central Venice, in Mestre, it is bang next to the Mestre train station/bus station where you can get straight to Venice. the only thing I would say, is I did not expect the music to be so loud in the bar that they rent out on the Saturday night (however, it was first day of Venice Carnival, so that may be why, but I could here it from floor 6, into the night)
other than that, cannot fault the hostel, as tonnes of space and very clean and friendly staff. kitchen also to cook any food you bring in. :)
would stay here again for sure!