From "Etch" to Testing ("Lenny")

[andy <geek_show@dsl.pipex.com>]

Has anyone any experience yet in changing their sources.list from "etch" 
(back) to "testing" (i.e. "Lenny")? If so, has it been a smooth 
transition, any problems or gotchas?

I suppose, more generally, when is a good time to switch if one wants an 
up-to-date system, albeit not bleeding edge and unstable? Are there any 
criteria for making such a decision, or is it really just the user's own 
preferences?

Thanks in advance

--

"If they can get you asking the wrong questions, they don't have to worry about the answers." - Thomas Pynchon, "Gravity's Rainbow"