The good: The excellent view of Mount Fuji right from your cottage window.
The cottage has great free wifi and is kept clean.
The bad: no restaurant on site, so you have to walk far to the nearest Japanese restaurant, which is actually very good and worth the walk.
Don't walk in the cottage with your shoes on or you will be yelled at by the Manager, like I was. (There was no sign saying "take off your shoes". He did say sorry, but yeah, it was a loud yelling)
You will be handed bed sheets during check in. I did not use the other blankets in the cottage, because they were not washed. If you are a regular backpacker, this may not bother you. My coat was my blanket.
The view of Mount Fuji makes this place well worth the cost.