I have purchased from them several times and think that the quality of the balls they send is usually better than their promised condition. I have always received the at least the correct amount and several times a few extra.
I had one problem when ordering when the price displayed was not used when I went to order. They said it was posted wrong on the web page but honored the equivalent price per dozen because they did not have the 50 ball buckets. Customer service was very cordial and immediately offered to fix the problem.
I really try to get the best price when buying something but have given up on searching around at other used ball sites or eBay because I know what I am going to get at this site. If you check the site from time to time they have deals that drive the cost per ball even lower. Oh and I have never hit a ball that I got from them and felt that it was defective in any way.