La Rotonde is a decent enough hotel for people on a tight budget. It was closed when I arrived mid-afternoon, so I found myself in a beach-side bar for 90 minutes until a hotel employee let me in. There had been a telephone number for reception but no-one answered my call. The staircase to my room was dark and poky and didn't bode well, but the room itself was spacious and cool, the beds were large and comfortable and the bathroom was spotless. The hotel restaurant offered, mostly, pizzas. My calzone was delicious, the house red was drinkable, and the service was friendly. Breakfast was standard fare. The hotel is close to bus line 8 which serves the Intra Muros of St Malo and is, therefore, convenient for cross channel foot passengers. There are several nearby bars, and the long sandy beaches are lovely.
Pros: My room was large and comfortable. There was a small balcony.
Cons: Hotel reception was poor. I arrived after a long train journey and couldn't get into the hotel - let alone my room until 90 minutes later.