It was way back in the mid '90's, so take this with a grain of salt
We've kept our boat
in Marina Seca two different times.
Both were a very positive experience.
We kept it one summer season in Marina Real.
At that time, all the slips were very short and the cleats
were corroding off the docks.
The place was nearly deserted, but the people running it were very nice.
They let us install our own through bolted cleats
, the price
was right and the pool was spectacular.
We swam there every afternoon during our several week updating of the boat
just before the next cruising season.
It was necessary to have a car to get to town because of its distance to stores.
That may have changed since.