They are good links, both women have the right idea about family (ie: they want one!). Worth the read.

And even though "economic" is right there on Pius XII's list of serious reasons to use NFP I was still really uncomfortable with the idea of me being in charge of how many babies I would have and when I would have them.  I know that that's part of the beauty of NFP, that it leaves room for God to change your plans, but it never sat well with me.  

I can't disagree with that, but grave economic conditions might be reason enough for others to delay the next child. I think people in that situation would have no doubts on how stressful that situation is and that it is grave for them.

But still, I have no intention of ever practicing NFP again.  I'm not good at it, I don't like it, and I don't think it's worth it.  The times I felt like I really wanted to delay another pregnancy were in those early years of all little kids.  Those are the hardest years, for sure.  But I was young and energetic and I could handle it.  

She puts it perfectly. She could handle it and therefore she was right to see it wasn't justified, but some can't. There truly are people who really would not handle a pregnancy (usually temporarily) for a time, or else their life or marriage would be in real danger of collapsing. On the other hand, there are people who just lack courage.

In the second one (in favor of NFP, kind of):

You hear a doctor say, “You shouldn’t do XYZ because it would put your health at risk,” and it’s tempting to immediately declare, “‘Risk,’ you say? I SHALL NEVER DO XYZ AGAIN THEN!” But it’s critical to do the best we can to identify what level of risk we’re talking about.

When you want advice from a doctor, it's important to tell the doctor what you want to know and why you want to know it. If you tell the doctor "I am a Catholic, I will not take contraceptives, and I accept all that comes from that. I could become pregnant even if I try not to.", then you will get a better answer. The doctor will know you are not going to sue him frivolously and your honestly will invite him to consider your situation properly and respectfully.

The arguments that NFP/abstinence ruins marriages are real, but only because NFP/abstinence is abused. If NFP is appropriate, the marriage shouldn't suffer because the reasoning is blatantly obvious to all concerned.