The main reason I gave them 4 stars is that I would prefer a ball joint on the speaker end of things. The current arrangement will allow you to tip the speakers down, and rotate the speakers from portrait to landscape, but they will not allow you to mount them closer to the corners and tip them in. That isn't a deal breaker because the ideal sound field has the speakers parallel to the wall, but I kind of wanted to do it anyway. Also, I received one box of two speaker mounts, which is all I needed, but as some other customers point out the description DOES say 2 packs of two. Other than that they appear sturdy enough to hold the Boston Acoustic CR6 speakers I bought them for.