You are not alone, this happens to all of us from time to time. Just this last weekend I had a guest give me an overall five star rating however, for location I got 4 and for value a 3, both of which are quite subjective in my opinion. Also, on occasion I also get fives stars in all categories but an overall 4 star rating. Sometimes I find if a guest perceives the location to be four star it can also influence the overall rating that they give you. I find that the rating system is flawed in so many ways. We are a 10 minute walk to the beach and our home is located on a golf course, so it's both a peaceful and picturesque location in my opinion. The only reason I think as to why I only get 4 stars for location is that we are not in walking distance to shops or cafes, but it is only a short drive (5 minutes), the same for walking distance to the beach, and for many of the tourist attractions in the area it can be a 20 minute drive but that is standard where I live, and the location is quite central.