If you have to travel from mumbai to kolkata or vice versa, then don't go for this train. The name "imperial" is now faded away. Instead once try the other mail (via nagpur mail).
This imperial train's punctuality is bit doubtful. Sometime it arrives with just 20-30 min but many days it arrive nearly 4-5 hrs delay. So if having a link or connected journey, then do keep a buffer of atleast 6-7 hrs.
Ticket availability is very poor. End to End people generally keep it as a last option but for people...
more... of dhanbad, asansol and gaya region, its the 1st and foremost option to travel to mumbai.
But Food is good and way better as compared to other trains of same sector like gitanjali and azad hind.