We stayed here when visiting the Ile de Machines and the Chateau of the Dukes of Brittany. Although not undercover, there is free on-site parking with security gates at night. About 250m to the Francois Mitterand Tramway Terminus for a frequent, good value, service to the city centre and beyond. Rooms basic but clean and the bed was comfortable. Staff were friendly and helpful. Breakfast was good.
We were travelling by motorcycle and pleased to see a custom bike builders co-located with a bar/restaurant in an industrial unit just across the road. It was very popular, even on Monday and Tuesday evenings, and served a wide range of 'craft' beers including some from the UK and good quality food.