I used it exactly as instructed (mic centered relative to the SE on vertical and horizontal axis, membrane flush with the front edge of the SE) and it does focus the sound substantially, without any of the muffled low-end problems caused when I tried to minimize the room effect by creating 'vocal booths' using foam or blankets around the singer. Using the SE, the vocals had a more clearly defined high-end and a more focused body.
The only thing I added was a little absorption above the singer on the ceiling, to get rid of the worst early reflections from there.
The weight and balance issues that have been mentioned in these parts before, well, I don't have them:
