As a solo traveller from the UK I was very happy with my stay at Hotel Chile Habanero, the staff were very friendly and attentive.
I stayed in Room 7 which was very spacious and clean. I chose to keep the window and blinds open instead of the Air Conditioner. You get plenty of sunlight and view of the sea but you will hear or possibly be woken up by whatever is going on outside. This wasn't a problem for me.
Breakfast was normally chopped pieces of 3 different kinds of fruit, tea/coffee, fruit juice, water, milk and some bread which could be toasted.
A big bonus is once you understand where you are, you realise that you are very well located for getting around Havana.
There is a good range of local shops, restaurants (even one on the floor above), bars, and clubs which are only 2 streets away (under 5 minutes)
Money exchange (Cadeca), Banks, and WIFI credit stores (ETECSA) are under 10 minute walk.
As Cuba is very safe and as long as you are comfortable walking, you can walk to Old Havana (Havana Vieja) in 45 minutes which I did a few times cutting through central Havana or along the Malecon.
Getting to and from the airport is under 30 minutes by taxi and cost no more than 30CUC.
If you're someone who wants a base to get around Havana for a reasonable price then I recommend staying here.