My boyfriend and I stayed here in mid-July and overall had a good experience. Only one main issue with our experience-- the cottage only has a window AC unit in the bedroom. Most of the year in Asheville I can imagine it wouldn't be an issue but it was downright hot when we were trying to sleep. The house rules understandably ask that you turn the AC off or down when you are gone but it was about 80* in the cottage when we returned in the evenings. Eventually we were able to get the bedroom cool enough to sleep by keeping all of the bedroom doors closed but I can't imagine how another two people could have slept in the living room. I know this is partly a regional thing (in Texas almost everyone has central air) but guests should be aware of the climate when they are visiting.
Otherwise the stay was great. We couldn't find an iron in the cottage and we alerted Michael. He was able to bring us one the next day. The kitchen accommodations were good and the bikes were a nice option. Michael checked in with us periodically to make sure we had everything we needed and was responsive.
A group of four would need to consider the listing carefully. The living space is plenty large but the bathroom is pretty small and the AC wouldn't be able to keep the whole place cool in the summer.