We took a day time sleeper bus with HM Happycar from Hoi An to Phong Nha. I received a WhatsApp message from the organizer to ensure we found the bus ok before departing. The bus was extremely clean and in great condition. The little bed capsules were private and lay totally flat, or you could put them into a partially reclined position. I am 5'4" and could lay completely stretched out, my friend is 5'9" and could do the same with flexed feet. There was a USB port, lights and air vents. The driving felt very safe and there were two drivers who traded off which helped us feel safe as well. We stopped 3 times for toilet breaks. After getting dropped off and going about our day, we realized we forgot air buds on the bus. I messaged them via WhatsApp and they responded immediately that they would ask their cleaning staff. They found them and organised a nearby hostel for them to be dropped off at for us to pick up at our convenience. Very impressed overall, would book with them again.

The female receptionists were lovely. The male staff at the university office were cheerful, caring, and enthusiastic. During my trip, there were two elderly families talking quite loudly. When a staff member reminded them to be quiet, the two elderly people scolded her. If they had given a bad review, I would have responded in kind. The staff member's reminder was very accurate. The two elderly people were talking very loudly, so loudly that I even dreamt about their conversation. So, if the staff member receives a complaint, please don't deduct their salary. If they do, please tell them to contact me at my phone number, and I'll assist them. My number ends in 666, the trip was from the university to Nha Trang on January 16th. Oh, and the lovely female receptionists even changed my single room to a double room and added a note saying (I'm alone) in love. But sleeping alone in a double room means every time the bus turns a corner, it's a disaster! I don't travel by bus often, but it's enough to give it a 10/10.

The car runs on time, the service staff is enthusiastic and friendly, and returns at the right place

I have left by accident some of my stuff in the bus after the ride and noticed it when the bus was already on the way to different destination, however I contacted support and driver and they did what they could to return it to me at the same day ! So grateful! For this they definitely deserve 5 stars! Otherwise ride was okay, we departed hour later as scheduled however arrived earlier for 1-2 hours. Had several stops and there’s no toilet in the bus. Normal ride, just really chilly inside, wear long sleeves!

We should really support good bus companies like Khanh Quynh, from the attitude of the drivers, staff to the facilities of the bus. The buses are new and very clean. I just hope that Vietnamese passengers will travel in a more civilized manner.

I'm surprised that this bus has a low rating. I expected the worst, but a modern, clean bus arrived. My stop was only 10 minutes from the hotel, which is very convenient and very ideal. 23.50 departure and 8.30 arrival. Very clearly. It's very fast from Nha Trang to Da Nang. The driver's assistant spoke English and helped. The bus was picking me up from some intersection where there was no stop, I was worried that the DDU was not there. But the bus arrived on time. I wasn't so nervous because I met another guy at the bus stop who was waiting for the bus. On the downside, the woman who called in advance of the trip told me to save her number and call her in case of any situations, and when I called to find out about the stop, no one answered the phone.