If you're planning on going to Zion, this is the place to stay.
The house was awesome. It truly is a place that is 'off the grid' but has all the modern amenities. It was comfortable, had amazing views from every window, and was super close to hiking trails. We got there when it was starting to get dark and woke up in the morning to amazing views.
Hank was knowledgable about the park and gave us a bunch of suggestions about things to do and see. He was also very welcoming when we arrived, making sure we had everything we needed. You can easily drive north out of their driveway further into the park and get access to many trails, away from the crowds, within minutes. Or if you want to go to the main entrance, it's only about a 10-15 minute drive.
Lastly, do not be afraid of Zion in the winter. We were very lucky to have perfect weather, but even if the weather wasn't great, there was still plenty to do.