Clean, neat. Benches and trash cans are present on peron. There are many shops nearby and a good location of the bus station. In general, everything is fine.
An ordinary station. But if the buses are from Lithuania, then the delays from abroad are unrealistic, for half a day. But it doesn't depend on the station. So it's normal.
An ordinary district bus station, well maintained.
The main attraction is a paid toilet, Soviet-style, but quite clean. How preparing for a queue at the border is a good option