Excellent overnight bus trip from Hoi An to Da Lat with Viet Lao. The staff was very friendly, the bus was clean, the driver was a good driver, and there was no music or unpleasant noise. All this at a good price with smooth communication in English, so I recommend it. For first-timers: there are no toilets, but there were three stops approximately every two hours (you are notified in advance by announcement). You cannot eat on the bus, but there are restaurants and snack bars at some stops. You must remove your shoes and walk barefoot. At the stops, plastic slippers are provided as you exit the bus; you return them to a bin before reboarding. A small bottle of water, a blanket, and a pillow are provided. There is a USB port. I couldn't get the Wi-Fi to work, but that might be my fault. For those who are overweight or very tall, I recommend taking buses with fewer seats (there were about 35, and I'm not overweight, but it was a tight fit). I recommend the lower and middle seats.

The informations about pick up locations etc are a little approximative, I asked Vexere where we could get to the big bus directly and at the end the location was still a mini van pick up that brought us to the bus but that is not a big deal. We left on time from Hanoi but made a very long break at the airport to wait some passengers I guess and arrived only 30 minutes late in Sa Pa so very good. There is no WC in the bus so think about it but you’ll do two 30min breaks in freeway area (3k dong to use the bathroom and they are very clean) and will also be able to buy a lot of different snacks and food. Very confortable seats ! Keep in mind that sometimes the quality of the roads is not that good so it can be very shaky. We booked the top 2 seats at the very back of the bus and you can feel the bus vibrating a lot, the lower seats just before these seats were much more confortable and we were able to use them as they were empty. Overall a very good journey :)