Cost prevented me from returning this product. The key problem area on all Hummingbird feeders is the feeding ports - the small brush on this set is waaaay to big for any of the feeders I have (Perky Pet / Aspects Humzinger / Birdscapes 710 brushed metal feeder). Actually, the small brush is too big for any feeder.How bad is that?I have swallowed my pride and will be writing off the cost of this item.