Product review (5 stars): as always Amazon come thru
I have used this service for several filters and they always are in stock and  mailed immediately. Like the service - I purchase from Amazon because it is easier than going shop to shop looking for items that are either out of stock or not quite right but will do-NOT!!!
I have used Amazon for years and find the service great for all things.-and even with shipping they were cheaper than the brick and mortar stores