I need to have a microphone held still at the height and angle I want. Once set up, it'll stay in position until I need to move it again.
This is probably a good use of it. I have some doubts about the boom/upright locking mechanism as it is plastic plates with a rubbery/neoprene-y ring held under compression. I'd imagine this is the weak spot, and indeed other reviewers allude to this. For me, this is for mic'ing cabs. The option allowed by the additional screw mount atop the upright is used for a room mic when playing about at home.
Overall then, I have doubts about the longevity of the boom clamp, but no doubt at all that it is a bargain stand for the penurious, has some flexibility, is very stable, is quick to set up ( careful about tensioning! ) and tear down and if I ever learn to sing in key/at all/ not flat etc, or take to stage announcement, I'll buy another. I look after kit.
EDIT:
The clamp longevity issue reared its head. I was using the stand, doing some backing vocals ( in key ! ) when I knocked the stand over. Yup, clamp snapped. It's still holding together, but for how long I don't know. I'll just replace the clamp with a stronger one and get on with it.