I installed phoenix on the recommendation of this thread. I like it because it's similar to NS 7 that I use on my linux box at work. I was getting sick of IE taking up close to 90mb of ram to open the 10 or so browswer windows I have open at a time, phoenix is using 39.4 right now for 10 browsers and they're all tabbed in one window, which is very easy to navigate between them all.
I have found a couple of bugs, when I print previewed, it got stuck and I had to kill it via the Task Manager. I installed a couple of Extensions, and I had to do it twice because they didn't take, same with some skins, I downloaded 5 and only 1 actually registered. The Extensions, I understand are most likely the guys who came up with tme, it's their code that is buggy. There has been one or two other times that I have had to kill it b/c it did something screwy.
Overall, It's okay, I'm not going to mess myself like some people in the thread I am probably going to stick with it b/c of the tabbed browsing and the memory consumption, but I'll upgrade when they have more stable releases.