In 2016 we wanted to drive from Italy to Lyon in France, drop off our hire car and catch the train from Lyon to Paris. Due to some glitch or upgrade of the station at Lyon the Paris train was going from Chambéry instead. We spent a night right in town across the road from the train station and handed the car back in the morning before we jumped in the Paris train. We stayed at the Hotel Mercure. As I recall, it was terrible for access, with a pokey little toilet impossible to get at with a roll-in shower chair. It might be okay if you are pretty active and can transfer. I zipped around Chambéry for a bit the next morning. It had a pleasant canal.