Comfortable and felt safe. I have been on many overnight busses through South America and this was a far superior experience. Comfortable bed / seat, relatively easy to find the bus and get on board despite the language barrier. Bus staff were friendly and very helpful. They even dropped me as close as they could to my hostel

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.

There was a bit of nudge via text message to get me to arrive 10 minutes before the scheduled departure time, but otherwise everything went well. The driver even dropped me off at my hotel. Of course, the driver drives like a maniac, especially overtaking without visibility, but hey, that's Vietnam for you.