From what I see Abralon, Siaair, NEAT, Scotchbrite are the main ones used.  I guess there are some liquid products as well.  Are there any others? 
Does anyone prefer the liquid products over the pads, and why?
What differences do you see between the pad brands? 
Why is one better than the other?
Which do you like the best and why?
What are issues that you have with each brand?

Just trying to get a general idea of what people are using and what they are staying away from.