I stayed here in Jan 2012 wen I was in Kolkatta attending a program at IIM Calcutta at Joka. This place is around a 30 mins drive from IIMC. The rooms are decent, clean and comfortable and I enjoyed the breakfast and dinner buffet arranged. I would not mind staying here the next time I am at IIMC.
You can get a bungalow, a cottage or a regular room. Don't go for the cottage in winter as it will get very cold at night.
It is far away from the city center and around 2.5 hours from the airport. If your are travelling to IIMC you will need to take a taxi to Joka (prepaid) and then pay by meter from Joka to Ibiza. The taxi driver will usually take two hundred rupees regardless of what the meter says. Most of my course batch mates paid the same amount.More