1. Since I want more privacy, is it better to buy all 4 berths in a room of second class carriage or buy 2 berths in a room of first class carriage? Will there significant difference in the facilities/services of second class and first class? (like will there be a private wash-bowl in a first class room, a more comfortable bed, free tea or coffee, etc)
2. I heard there is locker service at Kiev train station. Since I will take overnight train and I want to leave my luggage at the train station during day time. Is it safe to keep my luggage there? If not, is there an alternative to keep my luggage for the day?
3. Usually how long before the departure time can I board the train?
4. When I board the train, will there be attendants to check tickets and keep everything in order? I am afraid some people without tickets will board the train and take your place.