Location : 400meter walk. Depending on how cold the wether how heavy your luggage is. I would say its a good 4-7 minutes walk, theres a straight path from the the train station on the right side of the station. You wont spot it at first, but if you walked from the hotel itself you will see it.
You can take the train to Venice Santa Lucia which is the main area, one ticket will cost you £1.40, ten minutes ride. You can walk the whole island of the main area, around 4km, to make your life easier, get the Venice Pass , 48 hours for £35, unlimited boat ride from one end to another end in the island.
Overall the room is nice and comfy, u get everything you need. Just like what others said, because its near to train station, you can hear the train sound all the way till midnight, if you’re a light sleeper, maybe not for you. If not, the location are great