There's a lot of videos on the internet that have mixed feelings about a product like this, but I have to say that in my experience, this micscreen actually makes a difference.
I've done some recordings in an untreated room and I could hear a clear difference between the vocal takes with and without the micscreen. I'm using a K&M 260/1 mic stand because that's all I have available at this time and It bent my mic stand to hell, but tbh, I'm not even mad. I love the difference that this item makes on my vocals.
I would of appreciated some more documentation on the product, because you don't rly get an instructions guide on what are the best practices with this item but what I found out is that it's better to shove the mic as close to the back of the screen as possible. This helps a lot (at least in my case) with reverberations and other unwanted stuff that can get caught when singing in an untreated room.
I also like to play around with the side panels as well, depending on the intensity of the vocal part that I'm recording. For softer parts I like to open the panels wider, so that the vocals get an airy touch. For louder parts I like to bring the side panels closer in, so that it's much tighter and absorbs more of the unwanted frequencies.
I don't know if what I'm doing is right or wrong, but it seems do work just fine for me.
Pros: Good build, solid materials, relatively easy to set up and use, can be used either on a mic stand or directly on your desk.
Cons: It's kinda heavy but I guess that is to be expected and as I said, I don't really mind because it gets the job done. Does not come with recommendations for "good" or "bad" ways of using the screen