Several years ago my spouse and I took a vacation abroad and booked a tour with a local company. The guide was really shocked when I told him that I went with their company because they had negative reviews. All of the touring companies had fairly amateur web sites, but with the exception of this company, all of the Yelp reviews were glowing, 5-star, nothing-went-wrong-with-this-trip reviews. His company had fairly g…
Especially key is also what the bad reviews are for. Like in your case, you identify the bad reviews are unreasonable expectations. Bad reviews with claimed reasonable cause may be worth a little more pause. Also important is number of reviews. I'd rather have a solid 4/5 product with 100 reviews than a straight 5 star product reviewed only 3 times.
Not sure if it's possible for vendors on Yelp to reply to their customers in the forum, but I see this all the time on Amazon.