Are delta airlines anygood?

I'm flying direct from manchester to New-York JFK with delta. I'm just wondering what the service would be like... e.g in flight entertainment, will there be personal tvs or shared tvs, if they are shared do you have to buy there headphones? are the flight attendants any nice? do you get pillows and blankets? are the seats Comfy? do the seats have much room? is the food nice? thank you for your help....