If you're a nature lover and looking for a quiet, very simple, rustic place to get far away to, this is perfect. There's lots of land, trees and flowers, horses (and a colt!), birds (even flitting in and out of the house), bees, mountain bikes, long hikes, desert sun, a great sunny, semi-shade patio, no cell reception (except by a haystack on the property) and purposefully, no wifi.
Ricardo and his family were wonderful. We had missed an opportunity to stay at Paipai months back due to raining out and they kindly gave us a free weekend to come again which we happily accepted. Ricardo waited for us after a long traffic jam and late arrival so patiently, leading us from Puerto Nuevo through the pretty intense mountainous road in the dark. (Yes, a car with clearance/SUV/truck and a driver with nerves of steel would be a must).
The place has wood beamed ceilings, tin roofs, dusty skylights, a bunch of old school decorations, old books and magazines, and probably original furniture and gas and butane appliances from the early mid-20th century. (Like if you want ice, request it and it will be brought in a block in a cooler.) Paipai likely hasn't been renovated in many decades so it's like going back in time. (Kumai seemed a bit newer but with less room, and I think they are building a new house as well.)
The next morning, we hiked half an hour through views and horse ranches to the local restaurant, El Vareñero, with a dirt floor with adorable owners. They served amazing birria (goat & bean stew) eggs with salad, beans & handmade tortillas (they grow their own corn), and much needed cold beers and hibiscus (jamaica) iced tea. We made friends with the local characters (one, a race car driver of the Baja 500), and rented horses from the restaurant (150 pesos/$8 USD each) to get us more than half of the way back to Rancho Callado.
In the evening, Ricardo, a lovely and active gentleman whose English is perfect, brought us bottled water for the cooler, ice for our drinks, and started an oak wood fire for us to barbecue our dinner. We ate, watched the horses frolic as the sun set, and Ricardo returned later and quietly started a bonfire, giving us sticks for marshmallows. The following morning, it was breakfast and yoga on the patio. We felt privacy and still checked up on.
By the way, they don't have a hot tub, but just a regular bathtub with shower (and hot water.) They have a swing set/climbing frame and bikes for kids outside Paipai.
If you are afraid of bugs, spiders, high rocky roads, are a clean freak, or need something fancy (a big TV/wifi/cell service), this might not be your thing. But if you want to see stars, spend time with the people you came with, do some dancing, lounging, sunning or reading, and get away from everything, this is great.