What is the best combination of price and facilities when traveling by sleeping trains?
The first class carriages have only two beds in each compartment; they are equipped with air-conditioning system, and they are the most comfortable carriages. But the price for a 1-st class ticket is almost 4 times higher than for a 2-nd class ticket. The 2-nd class cabins have 4 (2 upper and two lower) beds. When traveling by 2-nd class, you may want to buy a full cabin, otherwise there will be three other people traveling with you, which may be uncomfortable and tiring. The cost of a whole 2-nd class cabin is close to the cost of one 1-st class ticket, which would be the best balance of cost and comfort.