Recently stayed as part of a group. At first, the lobby makes for a decent impression, as do the restaurants on the main floor. You get to your room, and if you're fortunate to have a high floor and great view, you're still felling good. And then reality sets in: Lobby is smokey, lounge chairs are stained with grime and flies are everywhere. Back in your guest room, you take a closer look and paint is peeling off of walls and ceilings, in some places revealing visible mold. A friend of mine's room was so bad the mold had grown its own cultures, like tiny mushroom clusters. He took a picture using his smart-phone to show others as proof. Each day inside the guest room your clothes take on more and more of the damp, mildewy and moldy smell. Room cleanliness was terrible: cobwebs; stains on upholstery and bedding; bathroom floor hadn't been swept or wiped from last guests; carpeting not vaccumed. In the week I was there I never heard a maid run a vacuum cleaner.
Being international tourists to the country and hotel, I can say service was OK. Restaurant maitre'd, hostesses and servers were cheerful and accomodating. Maids were upbeat and tried to engage in conversation. But then again, some of that has to be chalked up in their incentive to curry favor for tips, which are an important part of their earnings because of the way the government controls wages.
The hotel's location isn't ideal either: while you're right on the water, there really isn't anywhere to walk to. Cab rides would be essential to get anywhere.
There's a small market 1 block away in a building which contained a small cafe, grocery store and restaurant on the second level called the "Jazz Cafe" for dinner. DON'T go there. Severe food poisoining can and does happen and I can attest to this. I went with 2 friends; they had no issues, but I did. Not worth it.
The small grocery store did have some welcome basics, like pop, crackers and candy bars.
Finally, one saving grace about the hotel was the on-site spa. One room, run by a male physician, who did provide a pretty competent medical rubdown (massage).
All in all, I have to say "stay away". I had no choice; the hotel was picked by our tour group's director. Had I done my own reviews, I would've stayed elsewhere and gladly paid any differential to do so.

The rooms are clean but the carpet and furniture are old and smell mildewed. When the a/c was on I had strong allergic reactions to something in the room- probably mildew.. During our stay I found 2 cockroaches in the bathroom- in an 4-star hotel.. 1 of 3 elevator was out of order the 5 days we were there, a 2nd one only worked at times so sometimes we had to wait 10min (!) for the elevator. We had our room on top floor so walking was no alternative. When we first arrives the pool had no water, just dirt in it. Our 2nd they cleaned the pool and started filling it, but 3 days later when we left Habana it still couldn't be used.. The breakfast was OK, but don't even bother to try that "coffee" - it was distasteful!! If you are there as a tourist Vedado is not the best place to stay because there are no sights anywhere near- better find a place in Habana vieja

On returning to my room before the last night stay at the Habana, I checked the contents of my locked Safe and to my dismay discovered that I had had two £20 notes (sterling) stolen. This I am 100% certain. I immediately went to the room of a friend on the same floor and without giving him a reason, asked him to check his Safe. He had had £60 removed - also totally certain. To their credit the Hotel staff carried out an investigation - the Door Key also operates the Safe and on doing downloads of when both had been opened there were no unusual readings. BE WARNED that someone at the Hotal knows how to over-ride the system.

We stayed here last week for our final three days in Cuba. We paid 80 cuc per night including 'breakfast'. Our room was on the 18th floor, overlooking the Malecon and the sea. It was quite a stunning veiw through a filthy window. The inside of the window was filthy. The outside wasn't so bad.
We rang ahead to pre-book a room while in Trinidad. When we arrived, we asked to see the room before registering. This caused a flurry of activity and suddenly we had a choice of three rooms, all on the 18th floor. I went up and chose the best of a bad lot. All the rooms smelled musty, one had no a/c and another overlooked the pool from which the pounding bass of the music there rattled the windows. The room I chose had a working toilet and shower, albeit with lots of black mould. The bed was a bit lumpy but clean. I requested new pillows as the ones on the bed were covered in black mould under the cases. My greatest concern was that the room would be quiet. As I felt it would be, we decided to stay. Thankfully is was a very quiet room throughout our stay.
Our room was not cleaned during our entire stay. On the first day the maid came to make up the room just as we were showering before dinner. We got clean towels and sent her away. On the second day she appeared after midnight as we returned from a night of cabaret. On the third day she appeared an hour before we were meant to check out. Needless to say, she received no tip from us.
Breakfast was an odd assortment of food from freshly prepared omelette to lukewarm spagetti. I'm suspicious that the leftover food from the previous nights buffet dinner was served at breakfast. The bread was stale and the juice was warm. No water available and the coffee was instant from a filthy machine. You had to try to chase down a member of staff to get a tea bag. The second morning we tried the breakfast again but just couldn't face it on the third morning.
Two elevators of three were working but if you have a fear of being stuck in an elevator I wouldn't recommend getting in. There are many nicer places to stay in the area. Choose somewhere else.