My girlfriend and I stayed one night at Appelgren House about two weeks ago, and our only regret is that we didn't stay longer! We were planning our trip on the fly, so only booked the stay a couple hours before arriving. Nonetheless, the owner was near the door waiting for us as we pulled in, and was incredibly gracious in welcoming us (even at the late hour). Walking into the house, we were immediately struck by the range of artwork on the walls and in sculptures around the rooms; in discussing with the owner, it turns out these are all pieces he and his wife have collected from their travels around the world...very impressive.
After a quick check-in, we were taken up a staircase to our very comfortable and private room. It was late so we didn't stay up too long, but it's worth noting the wifi in the room worked very well (the router is in the room!), and the bed was incredibly comfortable.
In the morning we woke up and had a wonderful freshly prepared breakfast at our leisure, before packing up and heading out. The owner stopped by to wish us well in our travel back.
I will note is that having a car was helpful to get to Puerto Natales town center (~5 minute drive), but I'm confident we could've easily gotten a taxi even if we couldn't drive. For seeing Torres, it's probably a 45-minute drive to the TdP town, and a bit farther to the park itself, but definitely doable to drive back and forth.
We had a wonderful stay, and would highly recommend it to others!