I stayed at Pension Corazón Puro just last week, and it really is a lovely place with fantastic pilgrim hospitality.
Two things to comment on, in the spirit of full disclosure:
Corazón Puro is more of an albergue/pension blend than a full-on pension. It's a subtle distinction, which means that while you will get a lovely shared meal( uncommon in a pension), you will also need your own sleeping bag or sleep sack, as sheets are not provided (as they are in a pension).
The other thing to note is that light sleepers may have some trouble with the beds. The mattresses are the spring-y jobs that poke you more and more as they age, and the bed frames are the super squeaky kind. One move and everyone's awake. (Maybe it was just my room!) The good news there is that each of the five rooms has just two beds.
In all, a great start to your Camino, for one night.
Enjoy!