What I don't like about the
Fridrich method is all of the algorithms you have to learn. I'm not going for record times yet (I might eventually get the urge to though) so I decided that the Roux method would be good to learn because it looks like it is just about as good as Fridrich (and doesn't have many algorithms) and might actually be as good if more people would try it.
I believe I can do slice moves fast. I started practicing that after I posted this topic and I timed myself using my microwave (I have nothing else to use

) and I was doing 5 a second. My cube isn't very smooth though (25th anniversary crap) so I don't know how fast I really could go.
About solving the edges in Roux's method, doing just one of those algorithms doesn't solve all of them at once. You have to find the pattern you have that matches one of the pictures he has and do the algorithm for it. Then, if they aren't all permuted, find the pattern you have and do the algorithm. Then once they are fixed, continue to step 4b. If that doesn't work for you, just email Roux like they said.
What is the "tree of death"?