We really enjoyed our stay, and the house is very nicely designed/built/landscaped...it has fabulous views and is close to everything you want to access in Cabo Pulmo. The upper landing/deck in particular were great for watching sunset, sunrise, and tons and tons of stars every night (we saw a few whales breach from there also).
So overall, I think Casa Pulmo is pretty fantastic...I'll just mention the couple negatives so no-one is surprised...The one road into town has vehicle lights shining onto the landing at night (NOT much traffic in Cabo Pulmo, but you will not be totally undisturbed). Also, Tito's bar plays music into the night, and it is close enough to hear.