No such thing. People will have different experiences of a given rom due to different phone setup, different phone usage, etc, etc.
Read the first page & last 10 pages of any rom thread, that will give you an idea of the features & user experiences/any issues with recent build (don't ask for recommendations or mods will close the thread).
If it's important enough to cause you grief if it's lost, back it up. No excuses
Trolling for thanks is lame
Does Samsung's auto-brightness implementation crap drive you to self-harm ? A solution !
Probably the best thread ever posted on XDA
Failure to search is the leading cause of male impotence on XDA
If you don't know how to recover if things go wrong, what are you doing flashing custom roms ?