First of all, Never go via Paulo travels, Nothing seems to be right there: AC cooling is bad, Seats are not comfortable, noisy, punctuality issue. I will not recommend anyone travelling by this bus.
My tip to travellers:
1. Go for Grand Laxmi queen sleeper bus (we came back to Pune via this bus): Excellent bus, Good cooling, you will not realize reaching Pune in the morning so smoothly.
Very good quality seats, Blankets were clean, courteous staff, sleeper bed size was quite big and spacious.
2. Akshay travels: Read and heard good reviews from friends but never traveled.