A feeder you dread filling is a feeder that sits empty.
No cap to unscrew. No lid to set down in the grass and lose. Push the clip, the roof flips up on its hinge and stays attached, you pour, you snap it shut. It is a ten second job on the way back from the mailbox.
The clear body means you know when it is low from the kitchen window, so you are not walking out to check.
Washing is the same story. The base comes off, the opening takes your hand and a bottle brush, and every surface faces you. Two minutes at the sink, once every couple of weeks, which is exactly what Project FeederWatch recommends.