I bought a number of these to place on posts outside the windows of the cat rooms at a shelter where I volunteer (it makes for great cat TV - keeps them entertained for hours!). Price was obviously important as I needed to buy several. We've used them for several months now, and they're very easy to refill, and they hold a good amount of seed so they only have to be refilled every 2-3 days, depending on the weather. The birds love this feeder, and there are always multiple birds on each of them eating at the same time. I couldn't be happier with these feeders, and will definitely order more in the future when our new cat rooms are finished (we're expanding, and adding four new rooms).