Visited havelock island this week and this place is really strange. Post of the people there are bengali and tamilians. Booked a hotel 2 mins walking from the jetty point. When I landed to havelock via the ferry, it felt like a nice place with beautiful sea, but as the time progresssed and I started exploring the place I found it boring. I had a 2 days stay there and trust me the time passes really very slow. It feels like a minute is of one and a half minute. There are not much places to visit except Radhanagar Beach which was the only placed I liked during my visit.
Now coming to the food, I was expecting a lot of sea food to be there but the reality was far away from this. There was no fish or crab available at this time and also the food wasn't tasty and rather expensive. If you want to have some food in the lunch after 3 then it's a problem.
My verdict: The place in terms of accessibility is not good, the mobile signals don't come. You'll feel disconnected from the world.