We stayed at the Hotel Saratoga for a week mid October 2007. After visiting many of the other top rated hotels in Havana, I'd have to say that the Saratoga is probably the best of them all. Don't go there expecting International 5 star service, it's more like a very good 3 star, but still better than NH PC, Telegrafo, Inglaterra, etc.. Drinks at the Hotel Saratoga bars were cheaper than at NH PC, although NH PC do a great home-made leomonade !
The staff were very friendly and helpful, even when the Hotel's power failed for a little over a day, and the air conditioning stopped, all the lights went off and there was no water (as the Hotel's water is pumped around by electrical means), so no toilet flushing, shower or baths for a day or so while they got the power working again. They did give the guests a free meal in the hotel restaurant, and a bottle of Rum, but didn't arrange for the guests to be able to shower at another hotel.
We ended up eating in the hotel retaurant a number of times and were quite happy with the food, although my wife ordered the same meal two nights in a row and got two pretty different meals; Baby pig ribs with black beans arrived as a large pork chop with black beans one night and as a steak with black beans the next. On both occasions the meal was very tasty, but it highlights the contradictions of Cuba, you may not get quite what you were expecting.
Some of the basics need work, at breakfast one day you'd have a complete place setting, with cutlery and condiments, and the next day you'd be missing a butter knife and sugar, or the next day there'd be only one napkin at a two seater table and no milk.
Just remember where the Cubans are coming from, most of the people working in the hotels there have no experience of being in any other hotel, they have nothing to compare it to. As far as I can tell, there's no hotel school in Cuba, which is a pity as I really felt that they were trying very hard to please, it's just that they don't really have the experience necessary just yet.
Some practical observations, the Hotel has Wifi Internet access in the Mezzanine bar, and Ethernet cable Internet connections in the rooms, also both 110v and 220v power supply in the rooms.
Pizzas at the roof top pool (spectacular) were very edible, and better than those we tried at NH PC. Snacks at the Mezzanine bar were very good and the service there was very friendly.
Hotel location was pretty good, almost opposite to the Capitolio and we always felt safe walking various different routes to Old Havana due to the Tourist Police prescence almost everywhere and the complete lack of interest in material goods by the Cuban people. You will repeatedly be asked if you want to buy cigars, but when you reply 'Non Gracias', you will most likely be wished a pleasant holiday and then left in peace, quite refreshing !
If I was going back to Havana, I'd check to see if any newer hotels had been built and who was running them, if I found a newer hotel run by a European or US group, I'd weigh it against the Saratoga, as it stands, I stay at the Saratoga again.