Comfortable comfortable buses. Thanks to the organizers for the water. I was already running to catch the Varna-Istanbul bus and did not have time to buy water, I did not know that they were distributing it on buses. There is wi-fi, which allows you to stay in touch with friends and family, to whom you are traveling. The border was passed promptly. So I recommend flights. The only thing is that the arrival time will be different, so if you are going to the airport, it is better to get there in advance so that you can get from the bus station safely (without nerves).
A clean bus, they gave me water, a snack. The only thing that overshadowed the situation at the border, where a child's backpack was taken out of the bus without our knowledge, but we were not warned and, if not for the attentiveness of the passenger, we would have left without him (there is a tablet,
a phone ...)