We had a great experience in Volcano. The condo is fully equipped to live many days. It's old but very cute and well located to visit the Park. Some parts could be cleaner. We haven't met Linda but she responsed quickly and Marcy is really helpful if necessary.
The house is in a forest and it rained a lot at the place during our vacation. (Don't hesitate to go to the Park anyway. The weather can be different 5miles away in Hawaii.) Due to the rain, the housse at our arrival was full of moisture. We had to use each day the provided dehumidifier to keep our clothes dry.
Overall we enjoyed our stay.