The Colina has probably seen better days, in fact, it makes backpackers look like 5-star accommdation. We also stayed at Colina as part of our Intrepid tour, I think most tour groups star there as Cuba Star Adventures had a folder in the lobby also.
It is about a ten minute taxi ride to Havana central ie Old Havana etc. On the other hand, the university, the malecon, wall of flags and Hotel National are very close by.
We stayed there twice, at the begining and end of our tour. The elevator was broken and they told us it was going to be fixed in a couple of days, however upon returning there 14 days later, that was not the case. Yes, carrying your bag up four flights of stairs is not fun, you can tip one of the guys downstairs to carry it up for you, but I felt on principle it wasn't worth it.
We didn't have the pleasure of eating breakfast as we overslept, so can't comment on that, but my fellow tour group members said it was pretty average.
You can hear the room next door, so soundproofing is very lacking. There was a door with a latch, so I opened it thinking it was a cupboard, only to find that it was for the adjoining room, and they people in there weren't even part of our tour group. So not great security either.
Air conditioning was working, our room was very warm. Again, given the elevator we didn't bother complaining about the air conditioning.
I would definitely recommend casas in Vedado over staying in the Colina. I think someone summed it up earlier, worse than basic!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC