I bought a fountain for my cats and the appropriate filter on stock equal to, as the provider requires for the filter shipping costs of round 6 Euro. In combination with the well I've saved my and the filter I need anyway. The seams of the filter are poorly finished and go in some places after a short operating time on. Otherwise they fulfill their purpose well I think, anyway. The price of the filter is ok, but as I said, I find the shipping costs to attention pretty, especially since you could just put the parts in an envelope and send a consignment of goods, which would beat just around 1 Euro.
