Easy to install, easy to look at and THEY WORK!
Two Finches crashed into the window in one week, we ordered these, put four up and there have been zero instances since. Also, of note, we spotted two hummingbirds flying around a planter in front of the window. I am sure just a coincidence, but we don't see many around here, so there's that. They are very easy to install. I am anti-handy and put them up in 5 minutes. I placed higher up on window so as not to disturb our outside view. We received some compliments from various visitors on how attractive and natural they look. I highly recommend if you are having issues with birds crashing into the window.