Our family stayed here for one night last month and loved it. We were a little worried after reading some of the negative reviews on varying sites, but for the most part we didn't experience any of those issues. Yes, it's in the middle of nowhere, 15-20 minutes from Orvieto. This wasn't a problem for us since we had a car -- which I would highly recommend if you choose to stay here. Likewise, we didn't have any trouble finding the hotel, as there are signs posted along the road.
As for the room, we stayed in the family apartment which is separate from the hotel. We would definitely recommend staying in the apartment. I can't figure out why there are not better photos of it shown on their website, but we were very impressed by the size and decor! It was private, spacious, with 2 cosy bedrooms, 2 modern bathrooms and a large open living/dining room and kitchen. If I'd known it had a full kitchen, I would've stopped at the store on the way in, so we could've eaten there! It was also very clean.
We had dinner and breakfast at the hotel which was fine, although a little expensive with a limited menu. The dining experience was the most awkward part of our stay because some of the other guests seemed really uptight (probably because we were traveling with kids). Thankfully, our waiter was nice and made us feel very welcome.
The pool and gardens were lovely. We had no issues with cleanliness in either area and both days we saw maintenance cleaning the pool and tidying the garden.