No issues with COSTCO!! I have had a couple different products out of many that I needed to return for some reason or the product was inferior.
The return process was amazing. No questions asked - they knew immediately when I had purchased the items and did not require any kind of receipt. Definitely the easiest and best return policies and customer service personnel.
I have purchased many items at Costco and have not had any issues except for these two and they were handled very quickly without question. I am definitely a proponent of Costco.
So far everything I have purchased at Costco has been satisfactory. The experience there is no comparison to any other wholesale shopping.