[This review was collected as part of a promotion.] Purchased a year's supply of filters recently. I found the filters to be well constructed and price competitive with local big box stores. I had unfortunate damage to one box of filters (I purchased 2 sizes) in transit. I contacted FilterBuy and they sent out a replacement set the next day free of charge. If there is a negative to this process, it would only be where to you store them until needed? Other than that, this process seems to help ensure I replace the filters on a regular schedule to get the best results.
I ordered a custom size. One dimension was correct but the other was 1/4 too long. I was able to slowly cram the filter into place but only with great effort.