I have travelled in all three 2AC/3AC and sleeper
Toilets are terrible with no fans or non functioning fans. The toilet stinks most of the time because of the fan not working, no freshener kept etc. One in ten times we get to see a rat and one in two cockroaches. The coach pest control sheet says pest control done the previous day or so, however all these problems are there.
2AC/3AC - The coaches are all old. Once in a while we get a new one. The bottle holders are usually gone or torn, so are the magazine holders. The sheets and pillows are generally good with an occasional bad one. In 2A the curtain rods are bent or broken. Sometimes the curtains are torn too. The side lower berths in both the types are usually not horizontal and they sag in the middle.
Sleeper : The berths are most of the time dirty. Along with that sometimes they are torn as well. Coaches are ancient.