The customer service was great The customer service was great. I needed a filter that was no longer listed by size. Other attempts to locate the filer met with negative results. Upon contacting filterbuy, their customer service took the time to assist me in getting the filter I needed.

Amazing customer experience Amazing customer experience. They shipped our product and it arrived in a very timely fashion. We realized that we had ordered the wrong product - we called them, and their return process was so simple. Exceptionally good company to work with!

Bought 20x20x4 filters. They're not even close to that size. Bought 20x20x4 filters. These are a standard size available at any hardware store. Typically 19 5/8 x19 5/8. Filterbuys were 19 3/8 x 19 3/8 and weren't same thickness either. (smaller all around) So needless to say, they don't fit. Not sure how they can list it at 20" when it's much closer to 19". Very misleading on their website. Had to pay for return myself.

Not even close to size. The filters were supposed to be Merv 13 20x25x4. The actual size is 19-7/16 x 24-7/16 x 3-11/16. Needless to say they did not fit my filterbox and air can freely flow around the filter. Compared them to the Honeywell filter that came with my furnace and that one was sized as labeled. Who knows what the actual Merv rating is on that filter if they "cheat" on the size. Edit: After contacting Filterbuy, they have offered a full refund.

Absolutely great customer service Absolutely great customer service. I purchased six MERV13 filters before learning that the filter could damage my HVAC because the motor wasn't strong enough to handle them. Four months later I called FilterBuy on the off chance that I could return them for credit. The customer service rep was was not only friendly, she gave me a total refund. I offered to return them at my expense, and she told me to donate them, which I did.