I stayed here with 3 others for 4 nights. I wouldn't pick anywhere else to stay, even after seeing all the other houses nearby. The views were priceless. A short walk uphill takes you to the tallest point of Tamarindo which was awesome for sunsets. The interior of the house was very authentic, clean, comfortable, and homey.
As part of renting a house (as opposed to a villa or hotel room), we were worried that we wouldn't have all the services and amenities; however we were provided everything we could ask for and more: Upon arrival the property manager, Hans, met us at the house and drove me into town to show me where the ATMs and best places to go were (this was before we had access to a rental car). He couldn't have been more helpful.
We were also put in touch with Margarita, who organized a full day of activities for us and even cooked dinner at the house one night (upon request). She was great-- we told her what kind of activities we wanted and she put together everything and had further ideas for us, such as setting up masseuses to come to the house for massages.
The awesome local couple and their young son who live near the house provided maid, cleaning, laundry, and security services. They would see us coming up the hill and open the gate to the house for us every time with a big smile. Also, the morning of the day we left, they cooked a Costa Rican breakfast for us which was simple but by far the best breakfast we had the whole trip.
Then there was Layce, the "guard dog." What a sweetheart she was. We couldn't get enough of her company.
There were added bonuses that weren't mentioned in the listing description, such as an electric, full-body massage chair in one of the rooms. Another bonus (I think is mentioned briefly in the description) was a large, outdoor, covered bed that was perched behind the house; it casted an excellent view of Tamarindo, the ocean, and Langosta.
Book your stay at Casa Catalina and you won't be disappointed. There's nothing we would change about it!