I don't think I've flipped it down once. It's super nice not to have to worry about off cuts falling or the height of a roller stand.
It is sturdy, even if it doesn't look it. At the moment, I've got about 400 lbs of 8' long oak boards on the saw table waiting to be edge jointed. Without the outfeed, no way I'd want that stack on just the 2.5' of saw and would need to find some other place to stick them while processing. With the outfeed table they are supported well.