I went to Moscow with them and was satisfied... The bus (despite my age) is comfortable, you can stretch your legs, which is very important with my height.. Stops (on average) every 2 hours for 15 minutes are enough to warm up and have something to eat on the way..
In August, there was a trip to Anapa and back. The Higer bus. The bus is comfortable, USB charging, the air conditioner works with a bang. The trip went like clockwork, the 5+ drivers are polite, careful and safe driving. I recommend.