Jacopo has a great place in a perfect location in Venice. Because you're off the main tourist thoroughfare, noise and congestion are not major issues. Be aware that there is a bar downstairs, but we were both able to sleep throughout the night with no complaints.
It's about a fifteen minute walk from the train station, but once you are there, you're set in a prime location for exploration of the city. There are an abundance of great, inexpensive (for Venice standards) restaurants nearby, or if you prefer, a few grocery stores are only a short walk away.