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1.) What is the average amount of time it takes you to get into the sleep paralysis state/feel vibrations?
Depends on the person. But for me it takes about 15 minutes to fully relax and start to feel the onset of AP.
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2.) Whenever you perform this technique does it have to be in a particularly quiet place or can it have minimum amounts of noise?
I don't practice this technique. I use progressive meditative states and guided imagery.
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3.) Does it take large amounts of concentration?
When I first started I couldn't get enough consentration. But as I gained more practice it eventually became second nature.
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4.) In your opinion is it easier to do successfully than it is with phasing?
Not sure what phasing is so I can't really say.