I too dived right into the Firestorm Viewer and checked it out, as I tried V2 and Kirsten and couldn't stand how it is so not user friendly. I found Firestorm to be much more user friendly, the skin didn't make me feel like I was on some hallucinogen (IE: Kirsten~Oh it made me sick to my tummy trying to do anything in here and I couldnt find the skins to change it), I liked that I could move my boxes around the screen, the chat box had "tabs" and just plain better features that the other 2.
Suggestions I have to the developers of V2 & Kirsten...
1) Make the default "Skin" normal looking, not all fancy and hard to see anything on the viewer, if someone wants to kill their eyes then let them have to change the skin.
2) Let the "user" have more control over pop up windows, if there is one thing I hate..it is someone trying to control me or the programs I use...Hint, why I'm not into Slavery in SL.
3) Make it easier to use, dont HIDE things...let the USER have the option to hide the content we dont want to see!