Very dissapointed with ProSource of Albany overall. They initially underestimated the quantity of materials I needed for the job, which led to me having to call off starting the work the day before and delaying my schedule by two weeks. When i had to return some of the mortar, i was charged a 25% restocking fee. Then come to find out they sold me the incorrect modified thinset material, when only unmodified would be allowed and warrantied by the membrane manufacturer. They accepted a return on the thinset, but would not allow me to return 2 bags of grout when my installer suggested I use a better product instead. So in essence, I spent over $7,000 on materials, and they wouldn't accept back $80 worth of grout.