Whiplash

The thing that confusing me the most is that I'm getting good results with quick defrag + defrag from file list. So I was wondering why to use ordinary defrag at all. Now I'm keeping fragmentation at 6% (C:) and 4% (D:) easily and quickly on that way witch looks pretty satisfying to me. So, why wasting hours to get the same percentage with the ordinary defrag??? There must be some adventage of ordinary defrag. I would just like to know what it is.

I found nowhere more infos about "Benchmark drive" option. What does that "Random Speed" mean exactly. What number should I get to say that it's good or bad?

If I'm using quick defrag more often, will it be good enough as full defrag? In other words, will quick defrag do exactly the same work as full defrag, or full defrag can't never be replaced by it no matter how often it is used?

Well, I'm not some PC expert to understand how all those things about defragging work, but I'm wondering if it's possible to make that Defraggler defrags two or more drives at the same time? Are there some technical restrictions that make that impossible to do?