I purchased a desktop mic boom, and I needed a pop filter to keep those "p"'s to a minimum.
After a bit of searching, this was exactly what I was looking for. The clamp screws easily onto just about any mic stand/boom, and has MORE than enough range and width to cover any mic.
The flexible part of the stand stays how you bend it. You won't have a problem with it drooping down and defeating its own purpose. Also, if you wanted to move the pop filter away from the mic (for whichever reason you may see fit), you can simply swivel the whole thing away from the mic.
The fastener also seems absolutely solid, and I don't think it will be going anywhere in the near future.
Another important feature with this pop filter, is that the actual material which gives the pop filter its effect is double layered, with it hollow in the middle. Some other pop filter's that I've seen only have one piece, so they wont perform as well. Two, thinner pieces of material will allow more sound to pass through, and give optimal performance. There are absolutely no draw-backs to this product.
I use this stand for an AT2020.