It's enough.
We recently moved and DH changed jobs. Our income doubled. Our expenses didn't quite double, but close, so it's not like we're saving all of that extra income (we're in a far more expensive area of teh country).

But still, it's more than plenty. We don't go on lavish vacations or own new cars, but other than that we live pretty well, we save a lot, though we're always trying to save a little more.
Staying in this very expensive house and not saving, we could get by on about $45,000/yr. If we didn't have this house, probably $30,000 or less. We don't have to worry about health insurance and some other things most people need to take into account. I'm also really comforted knowing that DH gets a pension (and if he dies I get a portion of it) and we could live just on that if we had to (though, again, not in this house).
Sara