The Fly-Thru bird feeder is so simple to use for both me and the birds.  It is easy to fill and gives you complete flexibility on what type of feed you use.  The little roof keeps the seeds dry unless it is a hard rain.   The size is good for all kinds of birds from finches to blue jays.  We even had a woodpecker!  The recycled green material will last for years through all of the elements.  We really like this bird feeder!