We stayed in the Panorama hotel for one night only as part of an excursion to Havana from Varadero. All I will say is one night was enough! The staff were rude and unfriendly. The hotel is in the middle of nowhere. The rooms were modern but you could have been anywhere in the world - there was no Cuban influence. We had to complain three times about the air-conditioning which didn't work. Eventually they gave us a new room, but only after we got our tour guide involved.
We were pleased to be returning to Varadero!

Panorama hotel was definitely a bad choice. Although it is new and modern, this five stars hotel is not what I expected. It is too far away from the city. Romms are good and so is the pool area. But, service is terrible. You will find some problems if you speak only English. Also, do not expect to find anything of Cuban friendliness and hospitality here. Everything is too severe and stiff and the atmosphere is so cold! And not only the atmosphere! The air condition in the hotel works like hell so you may feel cold there and almost all of the staff have a cold! Fodd in the buffet is so-so but the service is awful.
There are so many hotels in Havana and I am sure you may find a better place to stay.