I have taken shoes/boots in for repair many times and Boris has made them look new again. I have taken a purse in to have its heavy zipper repaired. I have taken a Carhartt work jacket in to have its heavy-duty zipper repaired as well. In each instance the work was performed with high quality and great attention to detail.
Boris is not inexpensive, but I do think he charges a fair price. For the type of handiwork they do it is worth the price. Most repair work can be labor intensive and time consuming. l guess it depends on how much you value your broken-in, feet-friendly shoes and boots. Personally, I do not want to part with a pair of comfortable shoes or boots if I can have them refurbished. My feet are too precious to me and I use them a lot. I'm not sure what the gripes were from other reviewers, but I have never experienced shoddy workmanship here. However, if you're looking for bargain basement prices, move along to another shop (and remember, you get what you pay for).