Stayed here in late August and the temperature driving through Redding was 104°, in Lewiston a balmy 96°. There are "swamp coolers" which kept the home to about 81° during the day, but it cooled off nicely at night. Unfortunately there was a wildfire West of us, so open windows wasn't an option one of the nights.
Definitely sleeps 8. Beds for 3 adult couples and a bunk bed for 2 kids. Other than that, you're on basically a floor mat. Living room has a day bed and several "recliners" if you're comfortable sleeping that way.
The indoor pool was a god-send with the temperatures outside. Kids had a blast in the pool, as did the adults. The river was also an option, way colder than the pool, but nice. The dam was letting out a bit more water than usual so the level was fairly high, but we felt safe along the shore. Venture 10+ feet out towards the middle of the river, though, and the current was strong. Definitely not recommended for young children.
I marked 4 stars for cleanliness only because several pots/pans were dirty when we arrived. I'm sure the previous renters put them back that way, and it just wasn't caught by the cleaners. Easy to miss, but unfortunately left a bad impression.
It's a "rustic" cabin, with old appliances and dated furniture, so one might expect more for the price. But you can't beat the location, and the indoor pool and hottub make up for it.