We had a positive experience travelling with Thanh Ly from Hanoi to Cao Bang. The bus was already waiting in My Dinh bus station, the bus station staffs pointed out to where the bus was and bus staff helped with our luggage and shoes. The size of the cabin is clearly mentioned as 170cms. Those who are taller might find it uncomfortable. AC worked well, drinking water was provided. We did not wake up for the toilet break so we cannot comment on it. The bedding was neat, the blanket really kept us warm and the pillow was good. The staff checked where our accommodation was and a shuttle picked us up from the stop that we chose and conveniently dropped us at our homestay.